Error -2146434970 unknown to connect cardreader ZXP Series 7

Hi, we are working with a ZXP Series 7 printer from Windows 7 with the lastest driver, dlls and firmware.


When we want to print a smartcard, our software doesn't connect to readercard (it recognize it but it doesn't connect). The error number is -2146434970 and the message is Unknown.


Thank you in advance.