err to cut story to short :P

i have sound player in my global script.
and ok it plays all well and when i press STOP
button in dialog i have this for event: /splay -p stop

now, when i start mirc and my (global) script loads
i have as startup to play sound

so its /splay %startup-sound (the sound path and file is defined in variable)
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MY PROBLEM:
the script on startup plays startup sound
AND continues to play music that was las played in player

i use mirc 6.21, so is this some mirc bug or
is there something i can do to prevent this coz its realy annoying...