I'm having dropped connection problems while using VyprVPN. My Usenet tech support said,
"For good measure, it may be a wise idea to set VyprVPN itself as a trusted application in your firewall/antivirus programs, or temporarily disable those programs to see if the issue persists. It could be that one of those programs is closing the port after a certain amount of time. If you are behind a router, bypassing it and connecting straight to your modem may rule out timing-related port issues there as well."
I was able to work with my A/V program, but can't figure out how to set it truste/port forward on the router/firewall.