Problem with clip planes on ATI

[Ehsan Kamrani]

I have a problem with clipping on my ATI card. but my NVidia graphics card clips the geometries with the same code. Note that I have updated the latest driver of my ATI graphics card from HP website ( it's a laptop). Here are the information of my ATI graphics card:
OpenGL Renderer: Radeon HD 6490M
OpenGL Version: 4.1.10664 compatibility profile context
GLSL version: 4.10

in my source code I specify the clip plane:

    // Translate the world, then flip it upside down
    glTranslatef(0.0f, m_fWaterCPos[1]*2.0f, 0.0f);
    glScalef(1.0, -1.0, 1.0);
 
    // Since the world is updside down we need to change the culling to FRONT
    glCullFace(GL_FRONT);
 
    // Set our plane equation and turn clipping on
    CDouble plane[4] = {0.0, 1.0, 0.0, -m_fWaterCPos[1]};
    //glEnable(GL_CLIP_PLANE0);
    glClipPlane(GL_CLIP_PLANE0, plane);
    glUniform4fv(glGetUniformLocation( g_shaderType , "plane_equation"), 1, (GLfloat*)plane );
    glEnable( GL_CLIP_DISTANCE0 );
    //Render the scene
    glDisable( GL_CLIP_DISTANCE0 );

Then in my vertex shader:

gl_ClipDistance[0]= dot( gl_ModelViewMatrix * gl_Vertex, gl_ModelViewMatrix * plane_equation.xyzw);

Does my code have problem?

[Ehsan Kamrani]

My problem solved. I was sending the uniform information before using the shader But it seems that NVidia manages the clipping internally. It means that it reads the fixed functions such as glClipPlane() and ignores the clipping in shader( I disabled the gl_ClipDistance in my shader and my NVidia card clipped the scene correctly).