WHat format are the shaders in? They need to be GLSL ES for Android. Also, what do you mean by they're not working? Do you get an error? Does anything happen? Are you checking they compile using shader_is_compiled? Does your device support shaders? Have you tested using YYG shaders (which you can test by getting the Dungeon Demo - not the LITE one! - from the Demos page on start)?
Seriously, with such a vague request for help it's impossible for us to say what the exact issue could be, so please give more details...