Self test error -37051 visa 488.2 USB GPIB interface

Hi,

I recently bought a Ni GPIB-USB-HS+ device to communicate with a current source and a voltmeter. After installing Ni 488.2 drivers, I can see the devices in NI-MAX. I can also commucate with them by choosing "communicate with instrument option" and sending *IDN? command, but when I want to open VISA test pannel, it gives the following error : 

VISA: (Hex 0xBFFF005F) No listeners condition is detected 
(both NRFD and NDAC are deasserted). 

Do you have an idea on how I can solve this problem ?

Thanks