SimConnect_SetDataOnSimObject (No Reaction on Object)

[Webapache]

i was trying to rotate my windsock which is a SimObject.
But when i use this code to update the heading/direction of the windsock, there is no reaction to the object itself.
This is my code:

void updateSimulation(double windDirection)
{
   HRESULT hr;
   double Heading = windDirection;

   hr = SimConnect_SetDataOnSimObject(hSimConnect, DEFINITION_2, WindsockID, 0, 0, sizeof(Heading), &Heading);

}

DEFINITION_2 is the "Initial Position".
The object is created successfully by another function. But after that, when the wind is changed, it goes successfully into the "updateSimulation" function, i can see all the values of the variables stored in the "SimConnect_SetDataOnSimObject", but it don't react.
What can it be?

 

[kabekew]

How are you defining the DEFINITION_2 structure? It should look something like:

SimConnect_AddToDataDefinition(hSimConnect, DEFINITION_2, "plane heading degrees true", "degrees", SIMCONNECT_DATATYPE_FLOAT64);