Windows Remote Assist – A program could not start

The client was using an XP machine inside a network. Tried to get them to send me a remote assist request, but on send or save invite got a message:

Title: Message from webpage
Message: A program could not start. Please try again.

I had several go’s myself with changing several functions, but then spoke to the people who set up the network who said that security would have to be changed. They suggested that we use: Join-Me instead. Join-Me seemed easy enough to use.