nc's world:

修改webconfig里面的字段
 <membership userIsOnlineTimeWindow="15" >
      <providers>
        <add name="AspNetSqlMembershipProvider" type="Microsoft.ScalableHosting.Security.SqlMembershipProvider, MemberRole"

MaxInvalidPasswordAttempts="10000"

connectionStringName="SiteSqlServer" enablePasswordRetrieval="true"
enablePasswordReset="true"
requiresQuestionAndAnswer="false"
minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="0" requiresUniqueEmail="false" passwordFormat="Encrypted" applicationName="DotNetNuke" description="Stores and retrieves membership data from the local Microsoft SQL Server database" />
      </providers>
    </membership>