Servertransfer problems

Hi,

i transfered a Multisite from one Server to an other. I did do the Multisite setup, the did something wired. I am confusend!
They rooted the server somehow to a buddypressblog at http://diealternative.org/index/
They set it as root…

there is a buddypress on the root as well but this displays just a white page

All the links in for the template url is with /index/ but /index/ is just the buddypressslug. So the are not found.

I tryed to see the kind of ulr settings in network-> sites ( wp-admin/network/sites.php)
but this page is just white.
And http://diealternative.org/index/wp-admin is not working.

Please help, i really don’t get the problem and when i can’t reach this pages i am totaly handicaped.

tom