Conection problems

Hi everyone!

I'm new posting in this forum.
My problem is the following:

I've a laptop with an Intel Pro/Wireless LAN 2100 3B Mini PCI wifi card and
Windows XP home edition. There's no conection problem with it.

However, a friend of mine have another laptop with a Intel® PRO/Wireless
3945ABG Network Connection wifi card and Windows XP Home Edition too. it's
impossible to stablish a conection between the AP and the laptop. And i
don't know why. The AP is encrypted with 128 bits WEP.

By the way, is useful the Intel® PRO/Wireless 3945ABG Network Connection for
WEP cracking?

I hope u can help me. Thanks a lot for your time.