Small screw - can't get it out to replace batteries

[Confusedas]

How the hell can I unscrew a 2mm diameter screw to replace some batteries? Tried every screwdriver I have and none of them work, tis driving me a bit crazy

So, how would i go about doing this?

 

[Confusedas]

That's an image of what i'm talking about if it helps
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[Hitachimad]

You need a smaller screwdriver.
Pick yourself up a set or jewelers type screwdrivers. Most tool shops will have them, and a snip at only a coupled of quid.

 

[2scoops0406]

Also, you may need to apply a little leverage on the cover whilst unscrewing the screw.

 

[big-all]

belive it or not a nail about 2 or 3 inch long will have the correct shape to remove a small pozi/philips screw