Fonts not recognized on a specific port

Hi,

We have a indesign server running as a service on two ports. When we try to process a indesign document on a 18383 port, it says certain fonts not available. But, if the same document is processed through 41000 port, fonts missing error doesn't come up.

On changing the port from 18383 to 42000, it worked fine. Is there any reason for the port not able to find the fonts in the system?

Thanks.