I did a full re-install, just wanted to make sure!
It did work with a reverted navbar, however it completely messed up my site.
The navbar is actually part of my style, So I believe it has to stay modified.
I also understand that it is nothing to do with photopost classifieds!
I am just going to manually put all the links in place, not too difficult, it is working which is the important part!
Thanks again for the support.