Which Airport card for a new Mac Book Pro ?

Hi, just picked up my new MBP and am staying with my parents.While im here i need to work off my MBP but can not connect to my parents wireless connection.

Do i just need to install an airport card?

all new MBP's should have AirPort Extreme (802.11n) built in. Buying a card should not be necessary.

Hi, any ideas how to connect? Ive tried to connect using the routers wep key but no luck?

hm.. one of those "tried it, doesn't work, any help?" questions.

Some more information would be great:
Selected the right key (WPA, WEP, ...)?
Maybe there is a MAC filter and you have to add your new MAC address? Any error msg? can you ping the router?
...

try putting a $ in front of your passkey.

its a common problem with mac's on some routers.