I would bet that your problem is opperator error.

By default you have to use a password that is alphanumeric and at least one non-alphanumeric.

And if you enter the wrong pass too many times, it will lock the user out.

I would suggest two things.

1. find this line in your web.config, and replace it with the code below.

<providers>

<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" connectionStringName="LocalSqlServer" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="true" passwordFormat="Hashed" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression=""/>

</membership>

This will make it NOT require the non-alphanumeric, which is easier.

2. When you delete a user it removes it from the ASPNETDB, but it does not remove them from the classifieds_members database table.

I would recommend go into the members table and delete in manually from there.

Try out your new username with a simple can't screw up password.

Good Luck