Sheet metal embossing error

I am new to sheet metal and am having a problem embossing a rib onto my part. I keep getting the error that my parts thickness is not compatible with the form tool. I have tried multiple combinations and variations of part thickness and radius  on the form tool. I have attached my part, form tool and error screen shot. I am also still using 2009. I would appreciate it if anyone would give me some guidance on this.

SolidworksSheet Metal