"Rheilly Phoull" wrote in message . au...

Two things come to mind, 1) the screws are "tamperproof" ie not the same as
your screwdriver.
2) They are stripped.
For 1 you need a torch to examine the heads.
For 2 you need to apply moderate seperating force whilst turning the screws.
Also there may be plastic locking tabs involved.
Lotsa luck !!

Thanx
i'm gonna try your advice tomorrow morning, cross my fingers, hope to
be able to open this thing of box.

Have a nice evening,
eLeNa