This can be caused by another server using the same license number. There is a tool called QVSDetector that is part of the QlikView Powertools that can detect that. You can get the PowerTools here.
thanks for reply, i was cleared the issue like
step1 goto services and stop the all QV services. then
step2 goto C:\programdata\Qlikteck and delete all the files in the folder. then
step3 goto services and start the all the QV services and apply the licences in QMC . this will working fine. but Now every day i need to do this setps other wise this server goes Off Duty. i dont know the reason .
As per the Jonas i have the shared folders, rootmount .
If any one have the soluation please share me.