Error on flashing HP 8250

Hi Folks!

I got a HP-Writer 8250i (from an marketplace like ebay) and it didn’t write anything.
Therefore I read a lot of forums until I got the answer for my questions.

I have to flash the writer (cause the pre-owner flashed it to dead, I thougt).
I made it with the sony-flasher, because I read this is the only way to do.

Unfortunately it hasn’t worked!
I’ve got an error-message: Error (send header 30byte)

Can anybody help me or tell me what this means?

Thanx a lot!