Perhaps your chain is streched, or the cam gear teeth are worn.
Well, what I dont get is I bought a timing chain kit about last december, so a little over a year ago, and i installed a new chain tensioner, new chain, new sprockets, new guides... it was just a kit from checker...
um THERE'S THE PROBLEM, you replaced the most improtant part of your engine, besides the oil pump with
... it was just a kit from checker...