Best placement of fans with a 250mm side fan?

[Kris3000gt]

So I just got a new case w/ a 250mm fan on the side. My temps were cooler than ever. Then I got a couple of 90mm fans, one on front blowing inward, and one on the rear blowing out. Since then my temps have been a good 10-15 degrees C higher. So WTF!? Should I try pointing the front one outward? Maybe the 250mm fan is just trying to push too much air out and the fans are constricting the air flow. What does everyone think?

 

[V3NOM]

have you got the one at the front sucking air in and the one in the back blowing air out? put your hand in front of them.