[Q] defy plus code corrupt help! topic

Hello

I'm trying to get a Defy and this problem is new to me. I installed the Retail Room, when the battery died in the process. Actually the battery is bad contact (discovered it today) and that every time I turn the phone gives the message:

Bootloader
09.10

Code Corrupt

Battery Ok
Ok to program
Connect USB
Data Cable

I tried to flash the rom retail again, and RDS Lite is only the message "SW Update In Progress .." ..

Stay long until the battery dies again, which I carry in another defy up to 100% and try again.

What can this be guys? What I have to do to burn the right rom? I've tried some Chinese rooms but without success.

Thanks to al ! !!