WSG Jump macro

[Dragevez]

Recently been trying to make a jump macro to play WSG as I don't have a keyboard from 1990 (lower MS makes jumps easier). Been talking to most FCs and they all say the same that they are just using a macro. But currently I've tried both my mouse and keyboard software's along with AHK and AutoIt and it seems any combination of W and Space, irrelevant of what MS I put in-between them it always seems to slide off ledges.
Example AHK:
home::
Send, {w down}
sleep, 5
Send, {Space down}
Sleep, 5
Send, {Space up}
Sleep, 20
Send, {w up}
Return

Any combination of the sleep timer (or not having sleep timers) wont work and I'm wondering what I'm doing wrong. Google has left me dry and I'm hoping someone here knows what's up.

How to test if your macro works; stand on the very edge of a ledge and if he just walks off instead of jumping it doesn't work.

[advanta]

Nice work ty.