set profile properties during createaccountwizard

I want to store some user account values during the createaccountwizard in the profile so I can access them anytime a user logs into the secure site.

I've set up the web.config as such:
<anonymousIdentification enabled="true" />
<trust level="Medium"/>
<!-- profile -->
<profile enabled="true" defaultProvider="CustomProfileProvider">
<providers>
<add name="CustomProfileProvider" type="System.Web.Profile.SqlProfileProvider"
connectionStringName="ConnectionString" applicationName="/customFormsAuth"/>
</providers>
<properties>
<add name="CustomerId" type="string" customProviderData="DisplayName=Customer ID;Order=1;IsRequired=true;" allowAnonymous="true"/>
<add name="AgencyName" type="string" customProviderData="DisplayName ...