I am running MS WORD 2003 and have somehow changed the "hotkey" for ctrl-home -- every time I try to use it to go to the top of my document, the "Find/Replace" screen comes up (the ctrl-F is still working fine... ). I have tried to find where the hotkeys are mapped and have had no luck. Can anyone help me?

I am running MS WORD 2003 and have somehow changed the "hotkey" for ctrl-home -- everytime I try to use it to go to the top of my document, the "Find/Replace" screen comes up (the ctrl-F is still working fine...). I have tried to find where the hotkeys are mapped and have had no luck. Can anyone help me??
Tools, Customize, Commands, Keyboard (at the bottom)