adhs

hi thanks for this great forum. In my office i have 2 wanscam security cams running: the old one jw004 and a new one the hw0041. But in my windows monitoring software there is always only one of this cams running - only the cam for i openend port 99 in my router. if i tried it with a different port, the cam did not work. My question: does wanscam only work with port 99 - and is it only possible to run 1 cam (the cam with open port 99), not both ? thank you