I have just setup wp with ms feature and uploaded

Hi,
I have just setup wp with ms feature and uploaded the buddypress and marketpress plugin. How event though the admin pages seem to be working fine the frontend is not changinging at all. I have uplolaoded a logo but that does not appear anywhere and the middle Welcome intro bit is not appearing also.

The marketpress and buddypress page links and tabs seem to appear but the site is stuck on a blank page and none of the page inks seem to work.

I had some difficulty setting up wp ms as i had inadvertently added www in the site url and had to fix it through phpmyadmin.
Please advise .