OpenGL glColorPointer renders black - visual-c++

Question

Here is the breakdown: I load a model from an obj file and store into buffers as follows :vbo for vertexes, ibo for indexes , vao for state and num_indices an int with total indices number. To get the model color I exported a separate off file and extracted color information per vertex and I have an array with 4 values for each vertex so the size of the array is vertexno*4. My draw function looks like this.
glUniformMatrix4fv(location_model_matrix,1,false,glm::value_ptr(model_matrix));
glUniformMatrix4fv(location_view_matrix,1,false,glm::value_ptr(view_matrix));
glUniformMatrix4fv(location_projection_matrix,1,false,glm::value_ptr(projection_matrix));
//glUniform4f(location_object_color,1,1,1,1);
glBindVertexArray(mesh_vao);
glEnableClientState( GL_COLOR_ARRAY );
glEnableClientState( GL_VERTEX_ARRAY );
glColorPointer( 4, GL_FLOAT, 0, colors );
glDrawElements(GL_TRIANGLES,mesh_num_indices,GL_UNSIGNED_INT,0);
And the model renders black. I also have some cubes drawn in the draw function which I color using glUniform4f(location_object_color,rgba) and if I uncomment then the loaded mesh will take the same color as the last drawn cube.
In my constructor I have something like this:
glClearColor(0.5,0.5,0.5,1);
glClearDepth(1);
glEnable(GL_DEPTH_TEST);
gl_program_shader = lab::loadShader("shadere\\shader_vertex.glsl", "shadere\\shader_fragment.glsl");
location_model_matrix = glGetUniformLocation(gl_program_shader, "model_matrix");
location_view_matrix = glGetUniformLocation(gl_program_shader, "view_matrix");
location_projection_matrix = glGetUniformLocation(gl_program_shader, "projection_matrix");
location_object_color = glGetUniformLocation(gl_program_shader, "object_color");
If need be I can provide my shader_vertex and shader_fragment , I considered it to be a problem but im not so sure so if anyone knows why my model isn't being colored please throw a hand.