Need help plugging a leak

[SkyRocker]

I've been playing 260 $20+2 SnG's at party poker. The first hundred I had an ROI of 25% but since then it has gone down to 17% so I'm trying to plug some leaks...

When I look at my stats in pocker tracker I have some interesting patterns:

Level BBWon/Hand Went_to_SD Won_T%_At_SD PF_Raise

1 0.09 23% 62% 3.5%
2 0.04 24% 63% 4.2%
3 0.01 29% 47% 7.2%
4 -0.02 55% 46% 11.2%
5 0.01 67% 51% 17.9%


Is it possible to tell what I am doing wrong by these stats?

At level 4 the bb is 100 and thats when I most often start pushing if I have a short stack. So maybe I'm to aggressive. A jump from 7% to 11% preflop raise seems a little much to me. Went to showdown when seeing the flop 55% seems high as well...

Please I need help

And if some good players (> 25% ROI at the $20 or $30 tables) could post their stats, that would be great!

/SkyRocker