Handle InvalidAnswer

Hi,
I have created a custom membership provider that i use to create certain types of user accounts that
only require a User Name and Password nothing else this code below works great if i use the CreateUserWizard.
But if i try and create the account on my own in code behind i keep getting a status back of.
"InvalidAnswer" how can i properly handle this status and correct for it.
What needs to be done to make this work correctly.
Code and Web.config below.
<add name="FiPort_MembershipProviderEx"
connectionStringName="LocalSqlServer"
applicationName="/"
enablePasswordRetrieval="false"
enablePasswordReset="true"
requiresQuestionAndAnswer="false"
requiresUniqueEmail="false"
passwordFormat="Encrypted"
maxInvalidPasswordAttempts="3"
passwordAttemptWindow="10"
minRequiredPasswordLength="8"
minRequiredNonalphanumericCharacters="0"
type="SK.FiPort.DAL.SqlClient.SqlMembershi ...