Hello, we are used to connect to MS SQL Server, but now we have a customer request to work on Oracle, so we start testing our application on oracle and faced may problem, but know we are facing an error in the step of building the database(which was work fine on MS SQL Server 2008 R2). the error is:

Error Building Master DB: SQL error occured.
SQL error details 'Type: SerializationFailure;'
Query 'BEGIN
DELETE FROM "INFINITYMASTER"."Metadata.Type";
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p2_0, :p2_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p3_0, :p3_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p4_0, :p4_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p5_0, :p5_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p6_0, :p6_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p7_0, :p7_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p8_0, :p8_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p9_0, :p9_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p10_0, :p10_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p11_0, :p11_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p12_0, :p12_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p13_0, :p13_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p14_0, :p14_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p15_0, :p15_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p16_0, :p16_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p17_0, :p17_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p18_0, :p18_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p19_0, :p19_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p20_0, :p20_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p21_0, :p21_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p22_0, :p22_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p23_0, :p23_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p24_0, :p24_1);
INSERT INTO "INFINITYMASTER"."Metadata.Type" ("Id", "Name") VALUES (:p25_0, :p25_1);
END; [p2_0='2';p2_1='Xtensive.Orm.Metadata.Assembly';p3_0='1';p3_1='Xtensive.Orm.Metadata.Type';p4_0='3';p4_1='Xtensive.Orm.Metadata.Extension';p5_0='288';p5_1='Microtech.Andalus.Workflow.Core.WorkflowStateHistoryRecord';p6_0='106';p6_1='Microtech.Andalus.Business.ApplicationVersion';p7_0='131';p7_1='Microtech.Andalus.Business.BusinessUnitReports';p8_0='133';p8_1='Microtech.Andalus.Business.BusinessUnitRoles';p9_0='135';p9_1='Microtech.Andalus.Business.BusinessUnitUsers';p10_0='146';p10_1='Microtech.Andalus.Business.CustInfo';p11_0='169';p11_1='Microtech.Andalus.Business.DisabledFeature';p12_0='277';p12_1='Microtech.Andalus.Business.VersionControl';p13_0='167';p13_1='Microtech.Andalus.Business.DeletedMaskSerials';p14_0='183';p14_1='Microtech.Andalus.Business.LastGeneratedMaskSerial';p15_0='196';p15_1='Microtech.Andalus.Business.MaskSerialBusinessUnit';p16_0='265';p16_1='Microtech.Andalus.Business.UserEntitySerial';p17_0='177';p17_1='Microtech.Andalus.Business.QueryableQueryBuilder.FormulaProperty';p18_0='199';p18_1='Microtech.Andalus.Business.QueryableQueryBuilder.MeasureQueryableEntity';p19_0='222';p19_1='Microtech.Andalus.Business.QueryableQueryBuilder.QueryableEntityUser';p20_0='220';p20_1='Microtech.Andalus.Business.QueryableQueryBuilder.QueryableEntityRole';p21_0='215';p21_1='Microtech.Andalus.Business.Core.PhoneNumber';p22_0='267';p22_1='Microtech.Andalus.Business.Security.UserFavorites';p23_0='200';p23_1='Microtech.Andalus.DataDictionary.MenuGroupEntity';p24_0='269';p24_1='Microtech.Andalus.Business.Security.UserFilters';p25_0='271';p25_1='Microtech.Andalus.Business.Security.UserPreferences']'
Original message 'ORA-08177: can't serialize access for this transaction
ORA-06512: at line 3'

our Environment consists of: - Oracle 11g release 2 - Dataobjects.net 4.6.4 - its an ASP.net application hosted on IIS 7 on windows 64bit - Visual Studio 2013 .net 4 Here is my Domain Configuration:

<domain name="Master" upgradeMode="Recreate" connectionUrl="oracle://InfinityMaster:password@Oracle32/test" validationMode="OnDemand">
                <sessions>
                    <session name="Default" options="LegacyProfile,AllowSwitching,ReadRemovedObjects" />
                </sessions>
                <types>
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.BusinessProcessLogging" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Business" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.DataDictionary" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Drilling" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Security" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.UserProfiles" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Workflow" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Schedule" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.Reporting" />
                    <add assembly="Microtech.Andalus.Globalization" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.BusinessProcessLogging" />
                    <add assembly="Microtech.Andalus.Business" namespace="Microtech.Andalus.AuditTrail" />
                </types>
            </domain>