Opening different instances of SW 2014 from multiple users in multiple sessions

Ive installed SW 2014 SP5 on a Windows Server and I have multiple users connecting and opening multiple sessions. They also open multiple instances of SW 2014. Lately, Ive seen that 3 can work at a time perfectly but once a 4th user opens a session and starts Solidworks 2014, the server BSOD. At first, I logically thought it was a hardware problem. Ive checked memory and drives but nothing. Ive left the PC on for hours. Ive tried Prime95. Multiple hardware and software checks. None can do the same thing as opening SW 2014 for a forth time. I wanted to hear some thoughts on this. Installing SW 2014 with 5 different licenses (it was suppose to be worked on with 5 different users/sessions at a time) was possible so something like this should be supported right? Thank you

SolidworksAdministration