wordpress mu sign-up error

when running the index.php installation script, I have filled in the correct information but am receivind the following error…My tech help from hostgator says its a problem with the script, what do i do?
This web page has a redirect loop.

The web page at https://talktorbay.com/wordpress-mu/wp-signup.php?new=talktorbay.com has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer

If anyone can help would be much appreciated
Nick