Excel 2007 only permit to inser values like (+,-,ç,*)

[Bruno]

Hi,

Sorry for my english.
I can't insert numbers, letters, annything that is not preceded by a - our a
+, =.
I've pass for the Tools menu but nothings seams to be wrong.

For exemple, the cursor keys don't work.
the Enter key doesn't do the dirention down when pressed (it's activated in
options).

I don't do what appened, I've tried to see in foruns but notthing like this
appears in foruns.
Help me please,
Reagars,
Bruno