Where can I watch the episodes I missed for "Gossip Girl"??

I've tried youtube and like all the episodes have been blocked because of copyright issues...so I can't watch the episodes there. I've also tried to go to the cw website but it won't play on my computer. I don't know why but I've tried it three times and it still didn't work...so can someone please help me find a place to watch "Gossip Girl"!! Thanx