I had exactly the same problem when i changed the .009s to .010s , and actualy i had to stick with the .009s till i found the solution which was simply adding another spring..
from my expirience with Floyd Rose bridges I've noticed that for .009s you need 3 springs and for the .010s you'll need 4 springs, and 5 springs for the .011s (i haven't tried the .011s, just guessing!)

also fine adjustment will be needed as the guage of the low E strings change (.046 , .048 , .052) or changing your tuning (standard , Half-Step down, etc)
All you'll have to do is tightning screws that hold the springs or making them a little looser to have the bridge at it's perfect position , which is making it just floating on the surface and parallel to your guitar body..