How to change a font in Excel Layout on the Web

Hello, we are currently using an Excel layout on the web and want to change the font for Header info. The documentation says to edit the layout and change the Style of the cell of the appropriate Style Name i.e. SEM-BPS-headdata, SEM-BPS-head, etc. It appears to work when I execute the layout directly in BPS, but when I execute on the Web, the change does not only not show up, but the rendering on the front end PC becomes extremely slow.

Any help would be appreciated.

Scott

Callaway Golf Company