Our underlying engine is having compatibility issues with Vista. We'll see what we can do.
DL, You'll need to do this if you want out host to debug your network path:
#################
We need your help in gathering more information so that we can diagnose and correct your network connectivity problem. For initial diagnosis the best tool available is MTR, which provides us with complete information over time about your the path your data takes to our network.
For Windows, WinMTR is available here:
http://winmtr.net/
For Mac OS X installers are available here:
http://www.finkproject.org/download/
Most modern Macintosh systems will require download of the Intel dmg. Once Fink is installed "fink install mtr" from the terminal will allow you to use MTR. (Note that OS X 10.7 Lion systems require sudo privileges to run MTR.)
Linux operating systems typically have an installation via package managers. If you can't find an easily installable implementation please provide your distribution and we can provide appropriate instructions.
Please provide a copy of information from a sustained MTR session that has run for at least 5 minutes as well as the connecting IP so that we can do the best to improve your connectivity. If you are able, provide the same information from your server to your connecting IP to provide complete route information.
#################