Vex's Missile undetectable by GroupEnumUnitsInRange?

I'm using Vexorian's Caster system to make collision missiles. I'm trying to make a ground targeted aoe spell that can enhance slow-moving missiles. The problem is that the missiles are not detected by GroupEnumUnitsInRange. Am I doing something wrong or is this a problem that can be worked around?

Thanks ahead of time

Dummy units with locust can not be grouped by GroupEnumUnitsInRange... but with GetUnitsOfPlayer or something like this.

You'd probably like to add all enhanceable missiles to an array and then just iterate through them or something like that.

I'm sure it's not the best method, but I just add the missiles to a unit group as they are made, then when I enhance them, I cycle through all the units in the unit group and see if any of them are in range.

Thanks for help though guys.