Thanks aaron_delzeit and Ricardo P. for posting the fix. I tried it and it worked also. It is strange that I have to keep tapping the voltmeter probe to the button that has no voltage and all of a sudden, it beep. Then everything started working. My buttons only showed 3.25 VDC instead of 3.33 VDC. Well, as long as it is working, I don't care. Thanks again!