[ddots-l] Triangle parts in Sibelius

Dear All,
        I'm trying to write a triangle part in Sibelius.  My problem is that
I can't get the choked triangle to sound reliably when I play the G#
immediately next to the A5 that yields the open triangle.  If I choose the
MIDI Device option in Note Input Options, the opened triangle will play on
A5 and the closed is supposed to play on D6 according to JAWS.  However,
when I press the G#5 for the closed triangle, I don't always hear anything
played.  If I left arrow through music I've already inputted, I sometimes
hear a partially opened high hat where I would expect to hear a choked
triangle. If I choose the staff position option in note input options, the
choked triangle will be written as an x on G#5, not D6.  However, it still
won't play a closed triangle reliably.  If I alt tab out and back to
Sibelius, I might hear a closed triangle once or twice but eventually I'll
get a semi-closed high hat which is inappropriate.  
        I have just my laptop with an Oxygen 8, a 25 key controller with
octave plus and minus buttons one uses to alter which two octaves are
available at any given moment.  My big computer and 88 key keyboard are not
yet unpacked from my house move and won't be for several weeks.  If anyone
has any idea as to what might be going on, I'd appreciate any information.  
Best,
Kevin

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