Hi Sebastian
It's very hard to diagnose the problem from your description, but I'll try to help.
Can you use the second form to initiate a new process? It looks like there may be something wrong with your form?
Another question - why are you explicitly rendering the form, and assigning it to a user as a document. It's generally much easier to just use a regular xfaForm variable, which will do the rendering automatically. You can still use a different xfa variable, with a different template, so the form will look different.
Howard
http://www.avoka.com