Wireless network and Vista

Hi

I have been trying to enable a wireless network with access points, it works
fine if I try to logon with Windwos XP, but when trying to login with Vista I
am having a lot of trouble.

I can logon to the network on access point 1 but if I move over and try to
logon to access point 2 I am propmted for password but I can not connect, if
I then goes back to Access point 1 (which) I could logon to earlier) I get
the same error.

Can anyone tell me what is worng, is it some settings in VIsta or??