Floating license issue

We have bought a floating license for VisualDSP++ 5.0 and installed it on a server. The license manager status shows as Validated (Permanent).. But when we point a client machine to this server and try to open VisuaDSP++ 5.0, we get an error message to the effect of "problem communicating with the license server...". We are able to connect to the server from the client machine so there shouldn't be any communication issues. We followed the steps in this (https://www.analog.com/media/en/dsp-documentation/software-manuals/50_license_mn_rev_1.4.pdf) document very carefully.