Explosion field in NetObject doesn't propagate?

I have the following problem; I added a field to NetObject which is an ExplosionData object.

void NetObject::initPersistFields()
{
   addField("ballisticImpactEmitter", TypeExplosionDataPtr, Offset(ballisticImpactEmitter, NetObject),"Explosion Effect");
	Parent::initPersistFields();
}

Ingame i can see this on all objects as intended and setup a waterplane with an explosion assigned. In the scripts it is properly retreivable; however in the following code it is always NULL;

void NetObject::BallisticImpactEmitter(Point3F& position, Point3F& vector)
{
	if (!ballisticImpactEmitter)
		return;
.....
}

This code worked in TGEA and TGE, but not T3D. Any ideas why?