Every time I come to an exercise where I have to speak, the record button is greyed out and it won't let me press it to record my voice. My settings have the microphone turned on. I've already double-checked that Flash can use the microphone and my computer settings allow use of the microphone. I used it the first time I came on the site and everything went just fine, but it hasn't worked on this computer since. On a Mac 10.6.8, Chrome 19.0.1084.52. Anyone else come across this issue?