Jump Desktop cannot connect from iPad2

I have Jump Desktop on my iPad 2 and have the server client running on my Mac Mini and MacBook Pro.  Everything had been working fine since I purchased the app.  For the past couple of week, however, I can connect to the Mini, but not the MBP.  Both running Lion, both running JD 1.0.9.  To my knowledge, nothing has changed.

When connecting to the Mini, the connect hooks right in with no complications.  When connecting with the MBP, my iPad is stuck with a black screen saying "connecting..." After a couple minutes, it might ask for my login credentials, but then returns to the "connecting..." screen.

I have deleted the connection from the app and have used the supplied uninstaller with the desktop client and reinstalled.  No luck.

Any help is appreciated.  Thanks.