After installation - no website

Hi,
I'm really sorry to write my first post in this way and to ask help but I've just installed jm and now I dont' have the website working.

I have a black page instead of my homepage. (www.myroma.it/index.php)

I've unistalled jm but everything is the same...

Can someone help me?
thanks

ps. Admin site is working normaly... and I'm using J 1.5.25

Campanile - how did you resolve your problem - I'm suffering from the same thing pls.