>>Are you sure this isn't related to the ValidationGroup properties of the buttons concerned?
>>Best,
>>Viv
>
>The problem is, that I don't know where these ValidationGroup information comes from and how to associate it with buttons.
>
>Here is buttons definition for the Wizard, I don't see how to associate my groups with them.
>
>

>CreateUserButtonText="Next" FinishCompleteButtonText="Create User"

In general, a button should have a ValidationGroup attribute with the same value as the controls that will be validated when it is used to submit. You can have as many groups as you like using any name that you like. Don't know how this applies to your application though.
Best,
Viv