title in row group Matrix SSRS 2005

Hi,

I have a matrix with 3 different row groups, I need different titles in each of the row groups. How do I add it? I insert a table there in the row header, with 3 cells but when I export to excel is showing with error... is a known error from SSRS 2005, when you have matrix and a table inside the matrix.. So, I need to find another way to make it...

Let me know if you need more information.

Thanks!