Old Script errors messing up a new scene

Hi all i am learning the basics of unity and so i am working on multiple games and the problem i am getting is the errors from my previous game wont let me play my new game! it shows errors in scripts that arent even being used in this new scene! anyone has any idea whats going on here? i am using unity 4.1.5f1 btw

Unity will compile all scripts in the project and errors in any script will block the workflow. Doesn’t matter if the script is used in the scene or not.