sigmakey card dead!

Hi,
My Sigmakey not work anymore. I have windows 7 fresh installed , 32 bit . Same error :
SigmaKey v.2.33.01
Looking for S-Card... Not found (card readers searched: 1 of 1)
Please connect SigmaKey/Box
Now i have win7 32 bit and drivers are ok: alcor 1.7.26 reader and generic smart card.
Please help me!
Thanks!