Call pilot 100 ver1 ,MICS r6.0, I have several extensions using F989, record a call, but one extension, with the same COS, will let you install the feature on the phone, but when on a call and you activate, it just flashes the display like its going to work and then ignores it, no error message, nothing? Just returns to line id on display. Also, set up a test mbox to try the feature, which worked fine, but when I tried to delete the mbox, won't delete, says "mbox in use" ? What am I missing?