Glaxxterm 0 Newbie Poster

Hi)I've been using Codeblocks for a long time;since I configured the Toolchain executables shortly after installing I had no problems with compiler;but now when I try to compile a program, codeblocks responds with a statements about wrong compiler path;when I try to run a program it responds with "Target uses an invalid compiler; run aborted";I've checked compilers and their pathes and - everything is correct..can anyone tell me how to fix this?