I don't think the news is to good for you you are the third person in the last few days with optimum online that has lost their ability to connect to P2P networks. I believe they have started blocking P2P networks. You may want to try different ports and see if you can find one that works. Or change ISP one ploy that works some times is to tell them that you are going to cancel there service when they ask why let them know that you are not satisfied with there service because they are blocking P2P networks and you are going to get another ISP that doesn't block them there are plenty out there that don't block them.
The link below is from a couple of other optimum online users.
http://www.gnutellaforums.com/showth...threadid=49547