[V8i C++] Turning on snapping for transients

Hi,

I would like to display snappable temporary element in OnComplexDynamics method of my custom tool. So I tried to use transient element and  DRAW_MODE_TempDraw:

In my tool I defined member

TransDescrP transientElement
, and in OnComplexDynamics I have:

transientElement_ = (TransDescrP)mdlTransient_addElemDescr(transientElement_, descriptor, TRUE, 0x00FF,
                                                                   DRAW_MODE_TempDraw, TRUE, TRUE, TRUE);
, where 
descriptor
is MSElementDescrP of my element.

In above call the snappable flag is turned on. However obtained transient is not snappable during dynamics event. Interestingly, when I start another tool, e.g. insert line, that transient is snappable, and after reloading my tool, new inserted element is also snappable, also during dynamics.

How to control this behavior?

Thanks

Wojciech