More sure will work with this driver:

http://www.epass.com.br/downloads/ro...v2.5.8.521.exe

Taken from this page:

Pronova - Certificado Digital, NF-e, e-CNPJ, e-CFF, Smartcard, Token, Certificado SSL

This is ROCKEY 200 original Win7 64bits driver. And MxKey use same reader chip like Rockey 200 smartcard reader.

Please test and post your results. I not have now an PC with Windows7 64bits right now.

Manole
جرب كلام صاحب البوكس مانول