JAG check the DNS & DHCP for busted records.

>We recently changed old Windows 2000 web server (IIS 5.0) to a 64 Bit Windows 2008 R2 server (IIS 7.0). Three of our websites use Visual Foxpro 7 databases (classic ASP). I enabled 32-bit applications in the web server application pools, found ODBC Data Source Administrator for the 32-bit ODBC drivers (odbcad32.exe), and set up Use and System DSNs exactly the way they were in the old Windows 2000 server. All three websites work similar, and DSNs look similar (the only difference - they point to a different databases)
>Now one of these websites works perfect, other two - unstable. They suddenly refuse to connect. No errors, no log records, just shows status bar "connecting" forever. After several resettings of DSNs and restarting of web sites they work again for some time, than don't work again.
>Any suggestions will be greatly appreciated.