I just set up my home network and as long as ZA is off, I can print from my laptop to my desktop's printer. If ZA is running I get the error: "The RPC Server is Unavailable"

I'm assuming I need to add a setting or something to tell ZA to allow networking?

Thanks

Operating System:Windows Vista Home Premium
Software Version:7.1 (Vista)
Product Name:ZoneAlarm (Free)