I had a feeling that was the problem. I'm running 10.6.8 and while I'm confident I can upgrade, its anybodies guess how many other programs will stop working. It amazes me that itunes installed an operating system that it wasn't compatible with but I guess that's our friends at apple.
Model Name: Mac Pro
Model Identifier: MacPro4,1
Processor Name: Quad-Core Intel Xeon
Processor Speed: 2.93 GHz
Number Of Processors: 1
Total Number Of Cores: 4
L2 Cache (per core): 256 KB
L3 Cache: 8 MB
Memory: 12 GB
Processor Interconnect Speed: 4.8 GT/s
Boot ROM Version: MP41.0081.B07
SMC Version (system): 1.39f5
SMC Version (processor tray): 1.39f5