I have my stock iphone earphones in my ear, and my iphone in my holster. When someone walks into my room, I click the little button on the earphone to pause music. If I finish talking within a minute, I click the button again, and the music resumes. But if I pause for longer, the phone gets locked, and then the button on the earphone doesn't work. I have to pull out the iphone, slide across, unlock the phone, and resume the music. Why is that so? Am I doing something wrong?