There is a lot more to Firebug than the Console panel. You will need to be skilled at using Firebug to find what is causing your Javascript conflict and how to resolve it - see https://getfirebug.com/wiki/
Nevertheless I agree your theme is the likely cause - see http://wiki.simple-press.com/installation/troubleshooting/theme-conflicts/
I suspect you may have a jQuery error in one of your themes javascript files which is stopping jQuery processing before it gets to the CF7 script.