Xcelsius 2008-Combination Chart-Properties -Appearance Tab blank

I built a dashboard using 2 components- List Selector box and a Combination Chart.

I have completed selected the desired options and settings for the Combination Chart - under Properties: the General Tab, Drill Down Tab and the Behavior Tab. When I click on the Appearance tab, it is completely blank. There are no options to choose from. When I try to click on the previous tabs- General, Drill Down, Behavior, it is frozen. I get stuck in Appearance- with no options to select.

I cannot click on any of the other tabs in Properties. I cannot find anything under the SAP site or Bus Obj Bob that will help me with this issue. Thanks.