gurubuzz 0 Newbie Poster

I am currently using a Snappy Fax Server / Client Solution on some old Netvista 1.1 Celerons with 512 MB RAM windows xp. I can't seem to get a stable solution when I place two pci modems in the box. With one pci card the system works fairly well so i have 3 pcs running with 1 modem in each to utilise the 3 lines available. I would much rather have 3 pci cards on one system. Any ideas on what my best approach to fix the problem ? better pc or multi modem cards are outside of the current budget. I have also tried a couple of modems in an Intel Q6600 with 2 GB RAM and not very stable either.