Sorry...
I am trying to send:
Ctrl, Shift, TAB and the number 1 all at the same time.
i.e., Hold down all 4 keys simultaneously.
You cannot do that: it is two key strokes. ^+{TAB} ctrl shift tab is one key stroke and 1 is the second key stroke, so "^+{TAB}" & "1" would be the way I would try.
Are you trying to do this:
http://www.thescripts.com/forum/thread206970.html?