Thanks for your reply.
Problem seems to have cleared except for "Num Connected: 0". Don't know why that shows "0" when 2 are working?
Not sure what cleared the "can't connect" itself. I had same ID and password on all.
I did have an extra copy of iCam Source on the Mac laptop that I had experimented with to also connect a Firewire DV camera. (that worked individually also)
It appears when I disconnected the Firewire, the selection in Source reverted back to "built-in iSight" on it's own. Even though that copy wasn't open at the time, I'm wondering if that wasn't confusing something by having two copies of Source, one Open, one Closed, both with the same Camera selection?
If you can explain the "Num Connected: 0" thing I'd appreciate that.