Classroom 2.0/Podcast

Okay, so I have been trying on and off since late Sunday and Monday afternoon to log in and listen to one of these webinars/podcasts. I am so confused and hate this because I am very computer savvy!! Is anyone else confused or having difficulty as well? I do not understand how the process of these 'shows' so to speak, goes about! I've logged in and gone to 'chat,' only to see dozens of people in there that say nothing and all I seem to be able to hear on my end is all computer noises EXCEPT for what I need. For example, I can hear when I blow into the microphone, click the mouse and/or play music but I am unable to hear anything from these sites! Hopefully we can go over this tonight real quick in class!?