I've since downloaded and installed V4.1. I've installed this in a test area and it work beautifully. I even recreated the folder structure on my existing site (but not the actual files) and this again worked very well. However, as soon as I copy this across to my actual site I still get the same error as described in my original message.

 

Anyone got any ideas as I need to get this working ASAP.

 

Thanx