its because the keystrokes are not long enough, if you replace them with sth. like this it should work
Code:
send("{F4 down}")
Sleep(50)
send("{F4 up}")
but you also can change the sendkeydowndelay
Code:
Opt("SendKeyDownDelay", 50) ;50 millisecond
[ǝpoɔ/]
puoɔǝsı11ıɯ 05; (05 '"ʎɐ1ǝpuʍopʎǝʞpuǝs")ʇdo
[ǝpoɔ]
ʎɐ1ǝpuʍopʎǝʞpuǝs ǝɥʇ ǝbuɐɥɔ uɐɔ os1ɐ noʎ ʇnq
[ǝpoɔ/]
("{dn 4ɟ}")puǝs
(05)dǝǝ1s
("{uʍop 4ɟ}")puǝs[ǝpoɔ]
ʞɹoʍ p1noɥs ʇı sıɥʇ ǝʞı1 .ɥʇs ɥʇıʍ ɯǝɥʇ ǝɔɐ1dǝɹ noʎ ɟı 'ɥbnouǝ buo1 ʇou ǝɹɐ sǝʞoɹʇsʎǝʞ ǝɥʇ ǝsnɐɔǝq sʇı