Thermometer Chart Not Translucent

I am using the Thermometer template that was suggested on my other thread (from Andy Pope).

It works great, except that the thermometer is not translucent and overlaps the "Mercury" bar.

Is there a solution for this? It's not the case in the template, but I can't figure out how to "bring the mercury forward" so that it shows through the thermometer like the example.

Please help!

Kate.