really need help with this - please!

] lua_openscript_cl ahack.lua
Running script ahack.lua...
Couldn't include file 'ahack.lua' (File not found) (<nowhere>)

why is this happening? i have searched for hours

I use both of these locations

Normally when you're installing a hack you will need to place your .lua files in this directory.
.\Steam\steamapps\[username]\garrysmod\garrysmod\lua

If you have a garrysmod_old folder located under your username folder (in \Steam\steamapps\[username]\), you should be using this directory, or in any other instance where the game for some reason doesn't seem to find your files.
.\steam\steamapps\common\garrysmod\garrysmod\lua

is this because me not running bypasser with admin rights?

Is the file named ahack.lua or ahack.lua.txt ?

Quick question, Are you running a bypasser? Sometimes I forget to run abyss and that happens to me. *Edit* And yes you need to run a bypasser I suggest abyss

Press: WINDOWSKEY+R
run (type in): cmd (and then hit enter)
Window will popup, type in:
or
(replace YOURUSERNAME with your username in the example above)

Now check to see if you see your .lua file in there and that it is not named yourfile.lua.txt or something else