Help HTC Magic stuck on green screen T-Mobile MyTouch 3G

[tpdrich]

I installed Android 1.6 to my HTC magic my touch 3g device. but now it not start... stuck on green screen T-Mobile MyTouch 3G. so i try to installed ageain 2.3. but recovery said

--Install from sdcard
Finding update package..
Opening update package...
Verifying update package...
E:No signature (460 files)
E:verification faild
Installation aborted.

so please what can i do.... please help me...