I'm using Ubuntu 11.10 and cannot connect using wireless adapter. I have a Rosewill usb adapter - RNX-N180UBE.

Tried everything I can think of but no luck.

When I run iwconfig this is the result

lo no wireless extensions.

eth0 no wireless extensions.

wlan0 unassociated Nickname:"rtl_wifi"
Mode:Managed Access Point: Not-Associated Sensitivity:0/0
Retryff RTS thrff Fragment thrff
Power Managementff
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

Any suggestion to get me going?

Thanks, Tony