I have a Netgear WGR614 router running my cable internet connection. How do I find the proper MTU to set the router to? I am having problems with slow vpn connections and AIM and Yahoo losing connection and having to restart the app to reconnect to them. All PCs on my 3 pc network are having the same issue. Also, I had a linksys router that did the same thing so it must be something with the mtu or the cable modem.