[GMS] Flashing recovery fails (CWM/4EXT)

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http://forum.xda-developers.com – hey, i got an evo 3d gms 4.0/3.6 and want to root/s-off it. i unlocked it a htcdev and tried to flash a new recovery (4ext/cwm) but both fails. the flashing work fine but when i try 2 start the "recovery" the "htc logo" appears and the screen turns black for a sec and the next "htc logo" appears and the phone starts normaly. what did i wrong? adb / fastboot shows no errors. best regards chris (HowTos)