BleepingComputer.com: Pes6 Lags

I just wonder if anyone has the same problem as me. The game will lag for the first game each time i start pes6. So, normally what i do is, every time i start pes6, i'll have a "warm-up" match to let the lags take place on that match. Then after that, i'll finally will be able to play any match normally.

What i don't understand is, my computer pass even the recommended requirements. I could play far cry at the highest specs option. And never had any experience of game lags before (with doom3, pes5, far cry, splinter cell, civilization4 and all played at highest specs). Is this got to do with the fact that i'm playing with a pirated version (with the iso on the hdd)? If it is, then i won't be worried too much because i'm going to buy one soon enough (to play online game). But if not, what's the problem?

Here's my laptop specs:

Intel Core Duo T2400( 1.83Ghz, 667MHz FSB, 2MB L2 cache)
ATI Mobility Radeon x1600 with up to 256MB hyper memory
100GB 5400rpm SATA hdd ( 8GB++ available for the partition on which i installed the game and windows)
1024MB DDR2

Any help would be much appreciated.

no m8 i have full retail version and mine lags at the start too still havnt found a fix for it though so it got nothing to do with having a pirate version