which ones are you referring to when you say the rest? alot of the other included shaders are for manipulating textures and geometry, so for those you need to make sure your sending it a texture. Also you may need to set up the parameters to control the shader, I reccomend p.jit.gl.shader, its a great wrapper that maps all the parameters for a loaded shader.

"p.jit.shader" with the p, is a wrapper for shaders, look it up online