What CPU do you have? Have you tried the generic miner?
I tried with the 32 bits version and that work. My computer is really 64 bits so that's weird. Anyway, thank you!
in cpu-miner directory with minerd64.exe file, u can find file "minerd64-generic" try to use this in cmd ex.:
minerd64-generic.exe -a qubit -o stratum+tcp://qbt.mine-pool.net:9372 -u GaYLTWB6zJ5FwF3UkywaAJTB6txXQihkCb -p x
64 bit's version work fasters that 32..