i dont know but this is a strange problem, i created my database in the server, and By using aspnet_reg.exe i transferred all the default tables of aspnet in my database, Now when i use login option, i create an account, i deleted the my username BY USING ADMINISTRATOR WEBSITE , now i created the account with the same username and what i see is an error : Server Error in '/myweb/mywebfolder' Application. The user 'johny' is already in role 'User'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Configuration.Provider.ProviderException: The user 'Johny' is already in role 'User'. Source Error: