Keep losing licence to VRay

As the title describes I keep losing the VRay licence over the network. My IT department is replacing the licence server later today, but I have a question.

To log onto my main machine (dual 2.8Ghz Xeon) I use a user name/password, if I use the same on my other machine (single 3.2Ghz P4) which I have to, will that affect the licencing parameters in any way.

I ask this because obviously my user name/password to log on is via the same network as the licence so would 2 ‘log ons’ with identical name/password affect or confuse the VRay licence.

Thanx

the vray lic. server doesnt see or care for U/P it just sees the IP address. so i dont think thats the problem.