let me tell you the whole situation and please reply if you can help!
I had PSD9003 Programmable dual power supply (of SCIENTIFIC) , whose drivers are not with me , so to connect it with my laptop I used inf file and by turning digital signature off i installed the drivers through drivers wizard! Now it is detectable by by laptop and when i give query of "rm.list_resources()" in pyvisa it respond positively with address of instrument but when contact the instrument through "rm.open_resource('address')" , pyvisa command , it raises an error -1073807264 :the interface associated with this session is not currently the controller in charge .