Cannot browse Windows 2000 Server domain network wirelessly

I am working on a laptop that connects to a Windows 2000 Server domain
controller. XP Pro on the laptop got corrupted so the OS was re-installed.
Afterwards, I hard wired the laptop into the network to re-join the domain.
I then tried to connect wirelessly but am now unable to browse the network.
I re-installed XP using the same machine name and user account. No changes
have been made to the server or wireless router, only to the laptop.

Does anyone know why I cannot browse the network with a wireless connection
where I was previously able to and what it takes to resolve the issue?

Thanks for any assistance that you may provide.