It certainly looks as a javascript problem, as if DOJO isn't finding your triggerform
form tag (it's looking for its method
attribute but says the form object is null)...
Could it be that your activeOrders
transition is actually modifying that form and removing it, or maybe outputting different HTML for it than the one you show here? I'd suggest trying without the "activeOrders" event part.
And btw, you have a misspelled transitionon
attribute in your SWF configuration (should be transition on
)