on-change expression

I am trying to do this in my dbconfig file but it doesn't work. I am trying
to use one audit-trail-format for the "State" field if the "Priority" field
has changed and a different one when its not. But it appears that no matter
what, I get the first on-change action executed. any ideas?


field "State" {
...
on-change "Priority == oldpr:Priority" {
	add-audit-trail
	audit-trail-format {
		format "---------------------------------\n\
Change-Date: %s\n\
Changed-By: %s\n\
%s-Changed-From-To: %s->%s\n"
		fields { "$CurrentDate" "$EditUserEmailAddr" "$FieldName"
"$OldValue" "$NewValue" }
	}
}

on-change {
    add-audit-trail
	audit-trail-format {
		format "%s-Changed-From-To: %s->%s\n"
		fields { "$FieldName" "$OldValue" "$NewValue" }
	}
}
}



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