[Shanj]

I fixed it.
What it was that I'd installed lpp in its own directory.
Once I examined the error message carefully I saw it couldn't find its root .php file. It clearly needed it to go in the root vb directory, not in a special lpp directory.
So I uploaded the two folders in lpp's install directory + the .php file directly into my vb. It now works.

Except it just acts as an alternative to the existing private messenger. It still isn't possible to have an IM conversation which was really what I wanted. It's nice it lets me click beside someone's name but then all I can do is a single message not an exchange. Haven't got vbmessenger going. Still I live in hope.