403 forbidden error when trying to view pages 3 levels deep

[TimothyFoo]

Hi,

I've recently had trouble with an old site of a clients when I transferred the hosting over to a new server. Everything seemed to have run smoothly, but when I try to view a page that is 3 levels deep in the menu hierarchy and also has children, I get:

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.

As I mentioned it's a very old site, currently running CMS Made Simple 0.10.3.

I've tried searching the forums and I can't seem to come up with any fixes. Does anyone have any ideas that I could try?

I'd be happy to upgrade this site to 1.0.2 (in fact I'd love to), but the site has a ton (no really, this client is a very enthusiastic site admin) of content and I don't fancy my chances in managing a data transfer from a DB schema that old to the new one. I don't really know though. Is an upgrade possible?

It's an Apache/1.3.34 Server. I think it's running php4.

[TimothyFoo]

The error was being caused by the hosts security settings. I added the following 2 lines to the .htaccess file and all is now well...

SecFilterEngine Off
SecFilterScanPOST Off