If you’re S-Off you don’t need to run unrevoked again. Download Rom
Manager from the market and flash clockwork recovery. It should work.

But, if that doesn’t work try this:
Download Clockwork Recovery here:
http://solo.dc3.com/dinc/ClockWorkRecovery%202.5.0.5%20%28PB31IMG%29.ZIP
Rename it to PB31IMG.ZIP and put it on the SD card.
Reboot into bootloader. Apply the update when prompted. Reboot when asked.
Remove the file PB31IMG.ZIP from the SD card.

Download SU here: http://solo.dc3.com/dinc/su-2.3.6.1-ef-signed.zip
Put the zip file on your SD card.
Boot into recovery and use clockworkmod to “install zip from card,”
select “choose zip from sd card” and then select the zip file and apply it.

After that you should be all set. The Clockwork Recovery linked above is
an old version, so you’ll want to run Rom Manager and download the latest.