redirect loop problem – cannot access admin

When I try to login I get this message:
The webpage at http://www.johan-potgieter.com/leatherlearn/wp-admin/ has resulted in too many redirects. Clearing your cookies for this site may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.

I cannot see on my page what version I am running, because I cannot login to wp-admin.php

Help please – I am loosing my host in a few days and need to get my blog exported so that I can move to a new host!