I've been working in Captivate 5 all day and all of a sudden Captivate will not longer play audio on the timeline when previewing with Captivate 5. If I choose preview>movie I can hear audio and if I click on the item in the Captivate 5 library and click the play button on the wavelength preview it works fine. However every time I add audio to a slide or onto an object on a slide the audio will not play when I preview within the workspace. I don't understand why this is happening all of a sudden and it makes it almost impossible to line stuff up to the audio.
Does the issue disappear with a reboot? If not, try removing your Preferences folder, or clearing your Cache (under Preferences).