Mouse Arrow moving Slowly Using keyboard Keys

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http://askubuntu.com – My mouse is not working properly, So I enabled keyboard keys for Moving mouse arrow using Universal Access > Pointing and Clicking > Mouse keys "On" But Mouse Arrow moves very Slow using keyboard Keys. I want to move it in normal way as I move mouse, using keyboard keys(Numlock keys 2,4,6,8). How to solve this ? (HowTos)