Server problems

[eluser]ouzodestructo[/eluser]
Hi
I am new to Codeigniter and have been enjoying building my first site with it. I've come across a problem when uploading my site to my server though. You can check it out at www.mazar.com.au. The homepage loads fine so I know its all configured correctly. Then, clicking the first menu item 'Campaigns' should deliver me to the campaigns page, which it does on my local, but on the online server I get a '404 Not Found' error. And its not the Codeigniter generated 404 which is strange.

I don't know where to look to solve this because it works on my local and the homepage on this server works fine. I know i've configured the site correctly too, so I'm a little confused.

Is it possible that it may be a problem with the server? I have bought web space with servage.net who use clustered servers but I previously have had no problems with them tho.

Can anyone help me with this?