I use applescript in Runescape

I use applescript in Runescape to just press 1 but instead its pressing 1 in a chat command rather then in the action bar I use these applescript commands

Delay 3

tell application "RuneScape" to activate

repeat

delay 5

tell application "System Events"

keystroke (key code 83)

keystroke (key code 83)

end tell

end repeat