If none of the screwdrivers work, it's possible you've graunched the head of the screws, by trying to turn them with a screwdriver that's too small, making it (almost) impossible to remove with a normal screwdriver (depending on how badly graunched they are). You'll have to try and have a look at the screw heads to determine what to do next.
If they (the X notches which the screwdriver fit into) look relatively intact, you've been lucky and you just need to find the right size screwdriver (bear in mind that you do have to push down on the screws to keep the screwdriver from jumping out of the X notch as you rotate it, especially if this is the first time you've opened the blaster as the screws will be quite tight).
If they are not completely intact, but the basic shape is there, you could try a flat head screwdriver which fits into the notches.
If they are trashed (to the point that nothing grips them and they look almost completely circular [O notch rather than X notch

]) you'll either need a special damaged screw remover tool, or you'll have to drill out the screws and replace them (or just don't open the blaster, depending on what you want to do when it's open).
If you can't tell (and with some screws they look graunched when they really aren't) you could post a pic of the head of a screw head that you can't remove.
SEAL wrote:Also, please try not to overuse the smileys. One is plenty enough to convey your emotions; you don't need 9. Though not a written rule, I usually stick to no more than 3 smileys per post, unless the post is very long.
Technically there are 10 smilies.
But the message still stands; please use smilies to enhance your text, not the other way round.
