Cannot access wifi with cracked pass

[salmon1]

Hi,

I have captured a WPA handshake from a nearby AP, and run it through oclhashcat to obtain the passphrase, however I'm unable to connect to it. I'm assuming I'm near enough as I was near enough to capture the handshake originally, and airodump-ng is giving a power level of around -60dBm. Adaptor is a Ralink 2870.
Everytime I try to authenticate, it just comes back with the password prompt again after a few seconds. Silly question but I am using the correct part of the hashcat ppt file as the password? I have something like ssid:bssid:???:password.

Any ideas? I'm sure the password hasn't been changed in the short time between me getting the handshake and cracking it, although I haven't recaptured yet.

Thanks.

[atom]

mac address filter?

[salmon1]

Sorry forgot to mention - that was my first thought although I spoofed my MAC to match a connected client and still couldn't get on.

[Si2006]

Maybe the DHCP network range has been configured manually not to dish out any more IP's and that current attached devices have static addresses assigned to them.

[salmon1]

Good point re DHCP. I might try and spoof the MAC of a genuine client and try to request a few specific popular IPs, ie 192.168.1.2 / 192.168.0.2.