Hi there,
I have factory reset my device and the wireless configuration options have vanished?
Am configuring via Winbox on 192.168.88.1
Not sure if this occurred as a result of upgrade to latest OS or not (have had a good old muck around with it).
But reverting back to original OS did not fix issue 
Thanks,
Brendon
System>Packages enable Wireless. The package name was changed..
This option is not there.
What I mean is System > Packages > Wireless is not there.
Download the extra packages for rb2011 (MIPSBE) from there http://www.mikrotik.com/download.
Unzip the file and drag’n’drop the wireless package to your router. Make a reboot.