Garry's mod: Keypad wont work

When I use dynamite etc when i choose what key it is and press it it will no detonate the dynamite please help.

Might seem kind of basic, are you using the numpad on the right of your keyboard, or are you trying to use the numbers above your keys between the tilde and minus key?

You can only use the numpad to the right, as far as I know.

I dont have keypad on the right because I have a laptop.