Problems with playing Ps3 online?

Hey I'm not sure what to say, but I don't know it almost sounds like the problem is your PS3. My suggestion is that you look through your PS3 manuels for a number to contact Sony or something. If your xbox 360 is working online then the problem might be your PS3. Look for a number to call or some how contact Sony. If nothing helps, sell your PS3 on Ebay. Just sell it then with the games. Sell GTA 4 and get it for Xbox 360 since the the xbox version has downloadable content for GTA. Sorry about that dude, but the problem is probably the PS3. You could also sell your PS3 and get a new one instead since this sounds like a screwed PS3. Hoped I helped, good luck.