Alternating between wired and wireless networking

Hi all --

I posted a little while ago about constantly 'losing' access to my wireless
connection through my Linksys router -- that is to say, I often lose the
ability to access the Internet or my network through the wireless connection
(although I can ping sites and check e-mail through OutlookXP). I have my
desktop hard-wired to the router, and I use wireless access for my laptop.
Both computers are running Windows XP, and I'm using a WPC11 Linksys
Wireless adapter.

For transferring larger files to my laptop, however, I connect it directly
to the router through the laptop's Ethernet network card, and then go back
to using wireless access after that. Would this alternating between wired
and wireless access have any negative effects on the wireless access? I ask
because it seems like I experience the wireless access problems after
connecting the laptop directly to the router.

I've tried disabling the network adapter when using wireless, but it doesn't
seem to have any effect.

Any thoughts?

Thanks in advance,

Anthony