Our servers are up and running well.  But we did have a big change over the weekend, in the middle of the night on Saturday we moved to a new hosting environment.  For most, this should have resulted in a couple of hours of downtime.  I suspect your ISP or your Computer is still trying to access our old location.  This can be tested:  
On your computer, click the Windows (Start) button and type "Command", hit enter.  In the command prompt type "ping www.iflygps.com".  It should say "Pinging www.iflygps.com [173.236.5.27]..."  If you get a different number, then your DNS is old. You can force your computer to reset it's internal DNS by typing "ipconfig /flushdns" in the command prompt.  Also try a reboot.  
Please let us know if these suggestions help or not.
Thanks!
Walter