Access to custom profile field

Hey guys,

i have created a new profile field which is called "reason_for_registration" and is viewed at the registration form. What i now trying is to modify the "uservalidationbyadmin"-Plugin so the mail i recieve contains the text from the profile field.

I tried: $user->reason_for_registration but its empty :(

But why? Are some profile fields blocked or disabled?

And btw, the geocountry, geocity and other meta informations from geobyte which are fetched by the plugin are empty strings. Only a problem from me or have each of you this problem?