I have noticed nobody has mentioned your flash storage settings..
Flash Storage Settings
Make sure your browser allows flash content. Go to the Adobe Storage Setting Manager by clicking here . Move the slider so that you are allotting at least 100KB to storing flash objects. Check the "Allow third party Flash content" and "Store common Flash components" checkboxes.
my system some how reset my settings to zero and the left side would not come up,
checked settings and found the problem was the settings were wrong,Reset them and I have had no problems .I use IE8