ps3 lag issue

I recently fixed my nat problems not i get NAT2 and OPEN on cod6, I had to get my modem into bridged mode and set up PPOE on my router so now everything works all ports forwarded etc. Just like before its still lagging but now it dosent say Server connection timed out, now it lags like crazy whats the problem? This all started going crazy once i updated to 3.15 and i cant even play normally without it lagging every few seconds, i have a static ip set up on my ps3 and a diff one on my laptop should i put the ps3 in dmz and see what happens?