Ok update.
I reinstalled this hack after having a brain wave and this is what I found.
Im running VBSEO and when I deactivated it for a test all worked 100%, so........ within VBSEO admin panel there is a area called:
Exclude Pages?
Use regular expressions here to exclude scripts and/or pages from being affected by vBSEO. This prevents rewriting as well as copyright insertion.
I added lpp_messenger.php to this and now it works 100% with VBSEO activated.
Something for the developers to look at in getting it to work with VBSEO.
Anyway, thanks all.
Laters