It requires OpenGL 2.0 but your card only supports 1.20 (Look for the "GLSL Version: 1.20" below)
GLSL is an OpenGL Shading Language, this is not an OpenGL itself. GLSL was introduced like an extension in OpenGL 1.4, and later available like a core of OpenGL 2.0. ATI x1xxx cards support OpenGL 2.0+