Recovery mode dont work and alway get factory reset

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http://forum.xda-developers.com – Hi, I installed v30b for test but now i want to go back on cm10. I flashed a stock v20 with cwm with smartflash and i was able to boot in recovery. I tested to load my v20 rom but that alway come back to recovery, impossible to load my v20 rom. So, i tried to install cm10 and all was ok. But when i try to go in recovery mode, the phone restart without going into it and do a factory reset. Now each time im trying to go in recovery mode, cm10 do a factory reset What i can do for resolve this problem? (HowTos)