Can't start clockwork recovery image lately "Lately" (like in the last few months), I'm unable to start the Clockwork Mod recovery image on my Nexus S with Oxygen 2.2.1. When I select "boot to recovery mode" (or want to start a ROM backup) in ROM Manager Premium, it reboots and I see the Android icon. The very first line is red and reads: 

FASTBOOT MODE - NO BOOT OR RECOVERY IMG

I've (supposedly…) reinstalled the recovery image multiple times and ROM Manager tells me, that I'm on the latest version already (5.0.2.0).

Well… 

How do I install the Clockwork Mod recovery image? My phone is rooted, if that's important.

Thanks,
Alexander
Try flashing the Recovery image manually via fastboot, as described in this guide:


  
  Download the latest version of the ClockworkMod Recovery from here.
  Place the ClockworkMod Recovery Image in the same folder as fastboot (the /tools folder with the Android SDK folder).
  Power the Nexus S down, and hold Volume Up &amp; the Power button until booted into the bootloader. You should see a white screen with
  three skating androids.
  Connect the Nexus S to the computer via USB. On the computer, open terminal and run: fastboot flash recovery recovery-clockwork-5.0.2.0-crespo.img
  
  
  The ClockworkMod Recovery should now be installed on the Nexus S.