When using a network usb key the default TCP/UDP port 475 may need to be opened on any internal and external firewalls.
The NetHASP License manager uses TCP and UDP ports 475 for it's communication - so please ensure that these ports are open or that the program itself is allowed through the firewall. Alternatively, try adding the application exe directly to the firewall exclusion list.
See Can I customize my NETHASP.ini file? for more details.