I have two router as well as two switch. 1st router is Dlink's router, I used this router for sharing files and folders and also connect to NET. And 2nd router used for Windows Media Encoder to upload my audio data to other computer.
My first router is connected with a 16 port DLink switch, and also 2nd router is connect with another 8 Port Dlink router. Now, 1 computer has two LAN card and it connect with both router through switch. But both is not working at a time, but if i disable one LAN another is worked and vice versa.