Thread:Project:Support desk/Page reverts to index instead of showing special function such as :Special:Version or MediaWiki:Common.css

I installed a MediaWiki on my localhost computer with no problems. All operated fine. I then installed on a remote host. Installation went without any problems and minor edits such as changing the logo were completed satisfactorily. But...

When attempting to use special functions such as Special:Version MediaWiki:Common.css or MediaWiki:Sitenotice etc. upon hitting "enter" the page forwards (back) to the index page. The syntax being used is the long URL, so it goes from http://wiki.equine-reproduction.com/index.php/MediaWiki:Sitenotice back to http://wiki.equine-reproduction.com/index.php?title=Main_Page

I am logged in as Admin‏‎ (bureaucrat, administrator) but interestingly, nobody shows up under the active users list ("No users found") - I can however access the administration pages such as "unblock user" so it does appear that I am logged in with administrator rights.

MySQL 5 and PHP 5 and Apache servers (both locations)

This is a new wiki and has no other data entered yet.

Assistance appreciated!

Many thanks,

Jos Mottershead Equine-Reproduction.com LLC