Installation problem with permissions

Hello all,

I tried installing SuiteCRM and I was able to complete the installation. Every time I try to log in as an admin I get the following:

"Forbidden

You don’t have permission to access /index.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

I read that it had to do with permissions. I’m on a shared host so I cannot change the Apache users and groups. I changed the whole crm folder to 755 recursivelly to files and folders and then I changed the specific files and folders to 775 (recursivelly to files and folders).

I still receive the same error.

Any ideas or solutions?