Default putting t-mobile1.6 on XDA2 O2 --> dead (what to do?)

Hi,

I got an O2 XDA german and flashed t-mobile 1.6 rom today. The process took about 30 min, everything looked fine. The tool told me to remove it from the cradle and hard reset the device. I did...

now it is dead. what to do?

I read abaout flashing "the bootloader way..." does this apply for xda2, too?

thx for fast help,

Olga