[support] Problem with running Drupal 7 on Addon domain

Hi to all! I created an account with shared hosting company using domain e.g. "maindomain.com".

My friend actually has two domains (two different web sites) and I instaled 2nd domain as an addon (let's say addondomain.com).

I installed on both domain Drupal 7 with success. But, when I try to access to addondomain.com I would get "403 Permission Denied" error messge.

I contacted hosting company and the guy from tech support said it's because .htaccess from maindomain.com doesn't allow access to addondomain.com. I remember I had once installed Drupal 6 on "main" domain as well as on addon domains and it worked just fine. What should I do? Thanks for any help,

LAMP �