Can not use j,k,l,m key on Laptop help!

Hello,

I have a IMB laptop running XP operating system. I am unable to use my U,I,O J,K,L M keys.
When I use these keys I get number 4,5,6,1,2,3,0 instead. I was told it was the numb lock
but I am unable to remove it ....I have used the FN key, numlk key but that does not work.
I Can not use my laptop keyboard PLEASE HELP ....how can I get access to my J,K,L,M keys again.