Closed Unassigned: Unable to Login after upgrade to 1.5 [151]

After upgrading from 1.3.242.0 to 1.5.258.0, Login stopped working...I followed the Password recovery and was able to reset admin password but rest of the users when password is reset, system shows unsuccessful login.
Please note Active directory is enabled.

Two problems noted:

1. Only Admin Can Login-Rest get below messages even after a password reset.
----------------------------------------------Only Admin Can Log In -------------------------------
You can login with your member account

__Your login attempt was not successful. Please try again.__

---------------------------------------------------------------------------------------------------------

2. When authentication mode in the configurations is set to <authentication mode="Windows">, below error is generated.

The email supplied is invalid.

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 email supplied is invalid.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[ProviderException: The email supplied is invalid.]
System.Web.Providers.DefaultMembershipProvider.ValidateStatus(Int32 status) +113
System.Web.Providers.DefaultMembershipProvider.UpdateUser(MembershipUser user) +596
BugNET.Providers.MembershipProviders.ExtendedSqlMembershipProvider.UpdateUser(MembershipUser user) +14
System.Web.Security.MembershipUser.Update() +95
System.Web.Security.Membership.UpdateUser(MembershipUser user) +19
BugNET.HttpModules.AuthenticationModule.context_AuthenticateRequest(Object sender, EventArgs e) +1436
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

Any help will greatly be appreciated.

Thanks,

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