mistakes in the type of surface

when i try the code to determinate the type of surface i use BRepAdaptor_Surface.

my code:

//Retourner la surface geometrique de la face current(acurrentFace)

TopLoc_Location location;
Handle(Geom_Surface) aGeometricSurface=BRep_Tool::Surface(acurrentFace,location);

BRepAdaptor_Surface asurface(acurrentFace,Standard_True);

Standard_Real U1, U2, V1, V2;
U1=asurface.FirstUParameter();
U2=asurface.LastUParameter();
V1=asurface.FirstVParameter();
V2=asurface.LastVParameter();

gp_Pnt acentreofface;
gp_Vec aVec1, aVec2, anormalofface;
asurface.D1((U1+U2)/2, (V1+V2)/2,acentreofface, aVec1, aVec2);

anormalofface=aVec1^aVec2;

cout cout

//! Retourner le type de la surface : Plane, Cylinder,
//! Cone, Sphere, Torus, BezierSurface,
//! BSplineSurface, SurfaceOfRevolution,
//!SurfaceOfExtrusion, OtherSurface

GeomAbs_SurfaceType gettype=asurface.GetType();

if(gettype=GeomAbs_Plane){

cout

}

if(gettype=GeomAbs_Cylinder){

cout

}

if(gettype=GeomAbs_Cone){

cout

}
if(gettype=GeomAbs_Torus){

cout

}
if(gettype=GeomAbs_Sphere){

cout

}

if(gettype=GeomAbs_BezierSurface){

cout

}

if(gettype=GeomAbs_BSplineSurface){

cout

}
if(gettype=GeomAbs_SurfaceOfRevolution){

cout

}
if(gettype=GeomAbs_SurfaceOfExtrusion){

cout

}
if(gettype=GeomAbs_OffsetSurface){

cout

}
if(gettype=GeomAbs_OtherSurface){

cout }

the type of my surface is plane(i know this) but when i try this code he return all other surface (cylinder, sphere, bspline,........).

question n°2=how i can try the point of contrôl of surface?

i don't know why...........please evry one help me for this .........i needed in my project.......think you all.