SQL update error

Hi Friends,
I am developing an application in C# with SQL server database in my laptop. I am using SQL Server 2008 databases for my application. But my server (hosting server) is using SQL server 2005.
My application is working perfectly in my laptop with out any errors.
But when I connect the database with my server I get the following error.
System.Data.UpdateException was unhandled HResult=-2146233087 Message=An error occurred while updating the entries. See the inner exception for details. Source=System.Data.Entity StackTrace: at System.Data.Mapping.Update.Internal.UpdateTranslator.Update(IEntityStateManager stateManager, IEntityAdapter adapter) at System.Data.EntityClient.EntityAdapter.Update(IEntityStateManager entityCache) at System.Data.Objects.ObjectContext.SaveChanges(SaveOptions options) at System.Data.Objects.ObjectContext.SaveChanges() at MyProject.Libraries.Profiles.UserRightsService.InsertU ...