[Q] Can't boot cm9 after clean install

Hi everyone!
I am trying to flash cm9 with CWM v5.0.2.8, but the phone gets stuck while booting. Before flashing I wipe everything (dalvik cache, cache, data, battery stats), and format the system, and still I am getting stuck while booting again and again. I see a screen with a red circle with M inside it, the text under it is "dual core technology", and the text in the top - "unlocked". I can wait and wait but nothing happens. the only choice is to restore to the stock rom. My device is rooted and unlocked.
I Tried to use the previous version of CWM, but after I flash it with rom manager the recovery gets unreadable. I go into the recovery mode and see unreadable lines of text.
Please help me! I'm tired of unplugging and plugging the battery again and again..
Thank you!

Forgot to say:
I tried to flash the file "beta-0.2.0-cm-9.0.0-RC0-Sunfire-KANG-signed.zip".
Should I have flashed any special kernel?

Thanks. How do I flash a recovery? RSD lite is good?
Edit: I tried to use bootstrap, but it doesn't boot into recovery but into android. So how do I flash the "old" version of CWM?

Thanks for the help! I managed to flash the recovery, and then I successfully flashed the cm9! Thank you!