   sdl error in release mode
  Hi! I am trying to compile some code in vc++ 9, all works nicely when in debug mode but I get these errors when release:....Generating Code...Linking...Texture.obj : error LNK2019: unresolved external symbol _IMG_Load referenced in function "struct SDL_Surface * __cdecl loadImage(char *)" (?loadImage@@YAPAUSDL_Surface@@PAD@Z)Texture.obj : error LNK2019: unresolved external symbol _SDL_FreeSurface referenced in function "public: void __thiscall Texture::loadTexture(char *,int)" (?loadTexture@Texture@@QAEXPADH@Z).\Release/glutglsl.exe : fatal error LNK1120: 2 unresolved externalsthanks for any help!   