Many thanks for the constructive replies. I thought this was a remote forum and not a Crestron dealers forum.

As I live in a remote location is Australia I do not have the luxury of an abundance of crestron programmers to choose from. As it was, the programmer who did my original program did not do a particularly good job and was hugely expensive as they know they have no competition. This is why I have taken it on board to learn the system and program it myself.

I normally get some good responses when I ask things. Sadly, it wasn't the case on this post.

Anyway, I have worked out what the problem was.