My hack doesn't work on other people's computer..

What the title says...
I make a no-menu hack and when I try it in the computer I made it in It works :P
And when I try on my other computer that has the same OS it doesn't work ??

Everything works fine if try on the computer I made it in, but another problem is that I can't get No Damage Fall to work.
I'm trying to make suicide out off No Damage Fall, but it's not working here my code :

The addies I use are :

PlayerPointer : 0x009EDD6C
No Damage Fall : 0x00102C8

void nofalldamage()
{
DWORD dwPlayerPtr = *(DWORD*)ADR_PlayerPointer;
if(dwPlayerPtr != 0)
{
*(float*)(dwPlayerPtr+OFS_NFD) = -10000; //this should be negative
}
}

i think the other computer is need a following of this.
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