Elgin,

You might try to scan the list of forms already running and compare to the name of the current form you are loading...

Copy what you need from the function below I sometimes use...

FUNCTION DOFORM(cformname)
* procedure to start all forms that could be called more than once
* to prevent running multiple copies of the same form
LOCAL x, nform
nform = 0
* scan the forms on the screen
For x = 1 to _screen.formcount
	* formname is case sensitive and will be the name of the form
	If _screen.forms(x).name = (cformname)
		nform = x
	EndIf
Next
If nform > 0
	* just show it
	_screen.forms(nform).show
Else
	* run it
	Do Form (cformname)
EndIf
RETURN .t.

Maybe put the for/next loop in the load of your form class.
Just a suggestion.