I cloned a clients MiniBB onto a new server moving the files and importing the dbase.

All worked fine for a day and now suddenly I can no longer see any posts.

I can see the forums, I can log-in as an admin and conduct operations such as searching members - all of which seems to suggest that the dbase connection is fine.

The forums are here: wandptraining dot co dot uk/forums/

I have cloned the MiniBB as shown here.

You managed to fix the issue already? :-) As I checked your forum, posts were found, links worked, except the section "Health & Social Care Level 4 Forum" which is completely empty. Maybe it's contents are visible only to logged in users.

I've checked the forum and I see it's working fine. Not sure what the problem was/is.