wired and wireless mixing

[B2B]

Hi Guys

I'm looking for a bit of advice here please. I have a cable modem connected to ethernet port, a wireless pci card which looks at a wireless router connected to an adsl line which also has a dbox and nas drive connected.

I cannot seem to have both connections active as there appears to be a conflict of sorts as I lose the cable modem internet connection, although the cable modem and router are on different ip addresses.

I need both connections to use the cable modem to access the 'net and the wireless link to access the dbox / nas drive combination.

If I connect using my linux partition the wireless connection seems to take preference and I get the slower adsl connection.

Whats the solution here please, would assigning both connections a different netmask do the trick?

Thanks

Sipper