Keyboard shortcuts are not functioning

Hello...

I am in a real fix....I have been using X4 on the laptop...last night I discovered suddenly the hot keys are not working. I was trying to delete a line from the graphic layout...but failed to do it.

Tried to select zoom tool with F2, zoom out with F3 and fit to page with F4....all in vain. Then I opened MS word 2003 installed in my lap....and deleted couple of characters from the script....that did successfully.

I did it to confirm that the keys in the lap keyboard are physically in shape and functioning. I am stuck in the middle of my project.

Can anybody help?....