Recovery verified failed topic

Hi,

I did something wrong because I did not read very well the procedure so I'am in the deep s.....
Sorry pio_masaki, you writed in red DO NOT LOCK THE BOOTLOADER ON A CUSTOM ROM! but I read it after so it's my fault. I locked my bootloader after unblocked it and I put soe CWM update. With a few hope I did this post.

Now on my tablet I got :

Code:

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Erasing cache before SD update
SD update cmd: update recovery
- update_package=SD CARD: update.zip
Boot recovery kernel image
Recovery verified failed

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I try to lauch "fastboot flash recovery recovery.img" and I got
< waiting for device >

I Try to put Acer_AV041_A100_1.014.00_WW_GEN1.zip as update.zip file on my Micro SD card. That doesn't work anyway.
Is there a tiny tool for fix that?

Thanks for your help.