[MAX SDK] UI not functional anymore when loading scene

Coding
1

Hey all,

I have a helper with a very simple UI :

static ParamBlockDesc2 pointobj_param_blk( 
	
	optobject_params, _T("PointObjectParameters"),  0, &optHelperObjDesc, P_AUTO_CONSTRUCT+P_AUTO_UI, PBLOCK_REF_NO,

	//rollout
	IDD_OPTOBJPARAM, IDS_POINT_PARAMS, 0, 0, NULL,

	// params
	optobject_count,		_T("count"),			TYPE_INT, P_ANIMATABLE, IDS_SPINNER_COUNT,
		p_default, 		10,	
		p_range, 		0, 1000,
		p_ui, 			TYPE_SPINNER, EDITTYPE_INT, IDC_EDT_COUNT, IDC_SP_COUNT, SPIN_AUTOSCALE, 
		end,

	optobject_spline,		_T("Pick Spline"),		TYPE_INODE, 0, IDS_PBT_SPLINE,
		p_ui,			TYPE_PICKNODEBUTTON,	IDC_PICKBTN_SPLINE,
		p_sclassID,  SHAPE_CLASS_ID,
		end,

	optobject_object,		_T("Pick Object"),		TYPE_INODE, 0, IDS_PBT_OBJECT,
		p_ui,			TYPE_PICKNODEBUTTON,	IDC_PICKBTN_OBJECT,
		p_sclassID,  GEOMOBJECT_CLASS_ID,
		end,
	end
);

This UI works good when I create the helper. But when I load a maxfile with one of those helpers and I want to use the UI, nothing is working. It looks like it is not initialized anymore.

Anybody has a clue?

(also posted here : http://forums.cgsociety.org/showthread.php?p=7430700#post7430700 )

Cheers,
Robb