I am working on our upgrade to Mathematica 10. I have the version 10 license server running on a Windows 2008 R2 server. I have installed Mathematica 10 on a Windows computer and successfully activated it against the license server. On OS X computers, I receive the error message "The front end could not contact the MathLM server xxxxx.xxxxxx.xxx..."

I ran mathlm.exe -foreground on the license server, and when OS X computers attempt to activate, stdout yields the following error message: "xxxxx.xxxxxx.xxx - Administrator [31/Jul/2014:17:17:11] "Reading client packet" "Failed to read packet with error 429611" -

Any ideas?

Thanks, Tony