Gori,
I suggest you try the board on another computer. You need to find out if it is the software installation on this first machine that is not correct or if the board is not working anymore.
I suggest you just install the NI-DAQ driver on a second machine and then plug in your PCI board and test it from MAX.
If the board works in the second machine, then you need to refresh the installations on your first machine. Otherwise there is a chance your board needs to be repaired.
IF you find out the board is not working, just contact your local NI Office for Technical Support by dialling:
+39.02.41.30.92.17
Regards,
AlessioD
National Instruments