If you are the one who sent me the PingPlotter data, I responded. Your first 4 hops in your ISP's network is losing enormous amounts of packets.
For TCP type connections, you will only notice small stutters in the data flow as those packets are retried, but for a real time game connection there is just too much data packet loss in your ISP's network.
You need to contact them and send them the data you sent in to us (again, if you are the one am thinking of) and have them explain why they are having packet loss issues.
And if they tell you there is nothing wrong, then you need to find another ISP as anyone with any basic network knowledge will be able to see the problem in that data you have.