Question : strange network problem - random disconnects

I have an XP Pro workstation with two network cards.  One is 10.0.0.100 which goes to a LAN, but is not the primary LAN. The Primary network card is 192.168.1 216 and is on the main network with a gateway to the internet. At random times, all web browsing will stop and the logmein icon at he lower right will show as disconnected. After a brief period, it will reconnect again.
We have tried the following:
1) set the 192.168.1.216 NIC at the top of the connections order
2) replaced the network card
3) recrimped ends on the cable
4) ipconfig /flushdns & ipconfig /registerdns
5) Full virus and malware scans using multiple software
6) Updated drivers
7) Ran XPWinsock fix
The interestng thing is that I can perform a continuous ping to another device on the 192 segment and it will continue to reply. If I do a continuous ping to www.google.com, ti will reply but eventually time out for a period of time. The internal device I am still pinging will continue to reply, so I doubt it's cabling, switch, etc.
During the time that the continuous ping will stop while pinging www.google.com, I cannot browse through IE, and logmein will show as disabled.
Any thoughts or ideas would be greatly appreciated.

Answer : strange network problem - random disconnects

route add <target> mask <netmask> <gateway IP> metric <metric cost> if <interface>

Example :  route add 10.10.10.0 mask 255.255.255.0 192.168.1.1 metric 1

http://www.itsyourip.com/networking/howto-add-persistent-static-routes-in-windows/

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/sag_tcpip_pro_addstaticroute.mspx?mfr=true

I would recommend adding static routes on your box as you have two network cards ;