[aaronwelsh]

Assuming you're using NGRP.
You go to

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys){

}

and add your 'cmd:enter' code under that. You take away the zcmd code and add

pawn Код:

if(newkeys == KEY_SECONDARY_ATTACK)
  {

  }

Then all your ENTER code goes within the curly brackets;

pawn Код:

{
         //Chunk of code.
           }

Like the other person said, you can't just use any keys. Use the ones that are available,
https://sampwiki.blast.hk/wiki/GetPlayerKeys