Point Sprites distance attenuation problem GLSL

[Snuffe]

I have distance attenuation that works fine, as long as I do not use a shader(A vertex/fragment combo).
When I activate the shader (some colouring, displacement, nothing fancy.) all points are displayed the same size. Why? And what can be done about it?

[jra101]

Are you writing to gl_PointSize in your vertex shader? If so you need to call glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB).

[thinks]

check the uniform variable gl_Point. this is a struct which contains stuff about distance attenuation.