Using both wireless and NIC cards to conect to networks

I had a XP home network running using my wireless link on
a laptop. When i went to work, I plugged into my network
card and was able to connect to the internet. When I went
back home, however, I was not able to log back in to the
home network. I am able to get onto the internet, but the
network is not available.

I often get a prompt that states that a 'duplicate name
exists on the network'.

Any ideas on how I will be able to reconnect to the home
network and separate network at work using both types of
network connections?

Thanks in advance,
Rob