Hi guys I am making Nurb Surface but i am getting any

GLfloat ctlpoints[3][2][4] ;
GLUnurbsObj *theNurb = gluNewNurbsRenderer() ;
int u, v ;
ctlpoints[0][0][0] = -50.000 ;
ctlpoints[0][0][1] = -100.000 ;
ctlpoints[0][0][2] = -4.5474735088646402e-013 ;
ctlpoints[0][0][3] = 1.0000000000000000 ;
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GLfloat uknots[4] = {0.0, 0.0, 1.0, 1.0};
GLfloat vknots[2] = { 0.0,1.0} ;
gluBeginSurface( theNurb ) ;
gluNurbsSurface( theNurb,4,uknots,2,vknots,3,3,&ctlpoints[0][0][0],1,1,GL_MAP2_VERTEX_4 ) ;
gluEndSurface(theNurb) ;