Error: (10064, 'Host is down')

I'm running version 0.107 on OS X 10.6.3 (Snow Leopard) via CrossOver.

Installation was ok, but when I click backup I get the message:

"GMail Backup revision 691 (2009-02-20)
Starting backup of account...
Error: (10064, 'Host is down')
There are network problems, please, try it later"

any thoughts about this?

thanx!