[Q] htc desire root missing file error topic

Hi guys, hopefully this will be an easy one for somebody.
I have s-offed and installed amon ra 2.0.1 on my htc desire. Now,when I try and flash a rom it comes up with an error saying missing files,But I have tried 3 different roms.
I have done all the usuall,wiping cache etc.
It is a pvt4,hboot is now 6.93.1002.
Thanks.
Steve.