Main domain not usable for website

[PHiAX]

Hi everyone,

I never used ispcp before but i wanted to try it out on my homeserver.
I installed it to the best of my ability using to the guide provided.
The guide states that he panel should be reached @ admin.domain.com (which in my case would be admin.phiax.nl).
However, when i go to http://www.phiax.nl it shows my the panel login as well.
Before i installed ispcp my main website was there and i had no subdomains.
Now i want to make a seperate user for each of my projects, but i want my main website to be located at the main domain (http://www.phiax.nl) but when i try to add this domain as a new user the system tells me i cannot use the main domain.
What did i do wrong at install?
How can i setup my site @ the main domain and how do i make sure the panel stays @ admin.domain.com?

Oh and... very nice job, this looks awesome!