Face with internal hole and bounded by a wire, what's wrong?

Hi, I hope someone can help me. I am trying to build a face bounded by a wire, the problem is I am not able to add additional wires as internal holes afterwards. Note that I get the data from another cad system then I have all the trimming curves (i.e. edges) in parameter space (UV). The UV curves I use to build the wires are correct (they form closed loops and are contained in surface parameter domain). This is the code I tried:

Handle (Geom_BSplineSurface) surface;
Handle (Geom2d_BSplineCurve) boundaryCrv1, boundaryCrv2, boundaryCrv3; //these are UV curves
BRepBuilderAPI_MakeWire makeWireBoundary;
TopoDS_Edge boundaryEdge1 = BRepBuilderAPI_MakeEdge(boundaryCrv1, surface);
TopoDS_Edge boundaryEdge2 = BRepBuilderAPI_MakeEdge(boundaryCrv2, surface);
TopoDS_Edge boundaryEdge3 = BRepBuilderAPI_MakeEdge(boundaryCrv3, surface);
makeWireBoundary.Add(boundaryEdge1);
makeWireBoundary.Add(boundaryEdge2);
makeWireBoundary.Add(boundaryEdge3);
//NOTE: following wire is correct, makeWireBoundary.IsDone() returns true on it
TopoDS_Wire wireBoundary = makeWireBoundary; //I tried also = makeWireBoundary.Wire(), nothing changed
BRepBuilderAPI_MakeFace makeFace(surface, wireBoundary);
BRepLib::BuildCurves3d(makeFace); //Is this needed? Anyway nothing changed with or without it
//NOTE: following face is correct (it is bounded by the wire when drawn and BRepAlgo::IsValid(face1) returns true)
TopoDS_Face faceTest = makeFace;

// Now I need to add an internal hole
Handle (Geom2d_BSplineCurve) internalCrv1, internalCrv2; //these are UV curves
BRepBuilderAPI_MakeWire makeWireInternal;
TopoDS_Edge internalEdge1 = BRepBuilderAPI_MakeEdge(internalCrv1, surface);
TopoDS_Edge internalEdge2 = BRepBuilderAPI_MakeEdge(internalCrv2, surface);
makeWireInternal.Add(internalEdge1);
makeWireInternal.Add(internalEdge2);
//NOTE: following wire is also correct, makeWireBoundary.IsDone() returns true on it
TopoDS_Wire wireInternal = makeWireInternal;
makeFace.Add(wireInternal);
TopoDS_Face face = makeFace; //PROBLEM: when this face is drawn the internal hole is missing
Standard_Boolean bIsValid = BRepAlgo::IsValid(face); //PROBLEM: this returns false
BRepBuilderAPI_FaceError error = makeFace.Error(); //This doesn't help because BRepBuilderAPI_FaceDone is returned

I really can't figure out what I'm missing here. Any hint?

Thank you very much!

Gino