WordPress MU

I installed mu on http://www.beginlog.com/
For some strange reason i don't get subdomains working (my host says he did all in the install instructions).

Now i installed it without virtual server and now the template does not work.

Now it looks like:

http://66.249.93.104/search?q=cache:cp44rhoQmoIJ:www.beginlog.com/wp-newblog.php+&hl=nl&gl=nl&ct=clnk&cd=1

but

1) The urls people get is not subchoice.beginlog.com but http://www.beginlog.com/subchoice. This aint right on the signup page

2) The signup page misses the templates, it searches for the templates and gives error. What is the reason for this 'template screwup' ?

Thanks
Alex