Recording does not start

[RitaD]

Express Dictate has been working fine since we purchased it in May until one day last week. It has stopped recording. When you press the record button on the vDictate microphone, it appears to record. The record button turns red, the volume meter moves up and down as if it is recording, but no recording takes place. I've checked all settings in set-up according to your manual and online help. But cannot get it to record. Please advise.