Max2D and GL Drawing

i was trying to mix some Max2d Drawing with 2d OpenGl Commands but i Have strange effects

Here is the code

Strict
Framework BRL.GlMax2D

Import BRL.System
Import BRL.Basic
Import BRL.pngloader
Import BRL.Retro
SetGraphicsDriver GLMax2DDriver()


Graphics 640 , 480 , 0

Global image:TImage = LoadImage("tile.png")
While Not KeyDown(Key_Escape)
Cls
glBegin GL_TRIANGLES 'Drawing Using Triangles

glColor4f 1.0,0.0 , 0.0 , 1.0 glVertex2f 0.0, 0
glColor4f 0.0,1.0 , 0.0 , 1.0
glVertex2f GraphicsWidth() , 0.0
glColor4f 0.0,0.0 , 1.0 , 1.0
glVertex2f 0.0 , GraphicsHeight()

glEnd
SetColor 255 , 255 , 255
DrawImage( image , 100 , 100)



Flip
FlushMem
Wend

i cannot provide the image. use any png you have
my problem is that i am lossing the green value of the second corner of the triangle.

if i remove the drawImage command or use the shape drawing methods of max2d everything it's allright