Well, I'm was using an ISO and if thats the problem it would be nice if anyone could explain why it was working once and how to fix the problem.
Thx
Doubleposted Message Below:
I've done it^^. not the iso was the problem but Dark_AleX's SE-B Overclocking Module 02. I simply reinstalled 1.5 and then installed from 1.5 up to 2.71 SE-B" without the overclocking module^^ and now its working

__________________