Error 20544 in Crystal Reports on a certain XP computer

I have the same VB5 program using crystal reports installed on 3 different computers for testing. Two XP computers and one Win7 computer.

When the database and Crystal Reports are located on one of my XP computers, I get the 20544 Error message when I try to run a report over the network from either of the other 2 computers. When I put the database and Crystal Reports on either of the other 2 computers(XP or Win7), the Crystal reports print just fine when accessed over the network.

The crystal reports print fine on the problem XP computer if they are run from that computer and not over the network.

It seem to me that I am missing a file or DLL on the problem computer, but WHAT?

Would appreciate HELP!!