Select Server Gateway has just stopped working.....

After several months of silently just doing its job our Select Server Gateway has decided that life in not good anymore.  This is running on a Windows 2003 R2 x64 server with very few other applications on it (file serving and Exchange 2007 are its only real jobs).  Manual server startup gives rise to a 1067 error that local bentley support tells us in a communication issue that *I* should fix.  OK, but we have not knowingly changed anything...   I've looked but cannot find any kind of list of diagnostics to undertake to isolate the underlying issue.  It leads me to speculate if the Bentley side of things may have changed recently or am I the only one suffering from this ?

I've raised a ticket with Bentley support, <rant>I even tried the 'Live chat" but gave up and closed the window after being told that its was "Paging staff" for 2000 seconds with 0 ahead of me in the queue - must be based on our local major Telcos' support model. </rant>.

Nonetheless, just wonder if anyone else has gone through a similar problem and might to able to give some pointers as to how to diagnose the root cause ? Firewall (3 com) has both port 80 and port 443 forwarded to the server.