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My problem has something similar to that guy's problem in this thread,but also has something different!

This is my PC system
AMD Athlon(Tm)64X2 Dual Core processor +4000 2.10GHz
DDR2 2GB RAM (1.87 usable)
Integrated VGA (Onboard VGA) ATI Readon 2100 813MB total memory

Oh yes! I started using win 7 two weeks ago. (Ultimate version)
When I still in Win XP,everything is very OK,the game work very smoothly(expect in world 4,heavy weather effects,some scene slow the game)
And when I played the game in Win 7, soldnerx seem "loading" slower than in win XP 10s,the menu work ok.Big problems are in the battle,when I used the beam again numbers of enemy,..somehow is above 4,the game become slowdown,when I reach to the area near the jungle (in world 1),the game slowdown again and slowdown to end i can't play throught at all,can't enjoy too!

what kind of problems? How can fix it?
THanks!

I am sorry to hear about your problem. May I know which version of the game you are running? Did you install any patches, and if yes which one?

Version 1.01.
After met the problem, i tried to solve it by google. Oh yes,finally, the root of problem is lack of one software called "Catalyst Control Center",which optimize ATI VGA performance and quality,windows 7 just let my VGA run only Aero,background and theme,others are none...ah yes, i tried to play Counter Strike Source,the game work very ok, all 3D games i tried to play is work OK too,but expect 2D game like SoldnerX,but SoldnerX is somehow very special, 720 HD graphics with very high effects, the game's background,model,bullet,animation.....

Yes,after installed Catalyst Control Center,SoldnerX run smoothly,but still..

- in world 1, reach to jungle, the enemies divided into three barrier, there are two mosquitoes behind each barrier, i releashe the beam to destroy them,i move the ship up and down to "sweep" all of them,oh the game run slowdown in this time,after that,everything normal again.
- in world 4, the most world in SoldnerX has a lot of effects, when i reach to the area with many skystones,the sky is raining too, the game is slowdown, i fight again 5 minibosses with slow game speed ,yeah,it take 10 minutes to kill them,after that, the game run normal.