From your symptoms, you are definitely using literal mode, not formula mode. Gary’s instructions will solve the problem.
By the way, we recently updated the documentation for the web browser object to point out that literal mode doesn’t work if your HTML source contains curly brace characters, for example CSS styles. Unfortunately, this change to the documentation isn’t in the current version of the application, but it will be included in the next version. If you are include CSS styles in your page source, you have to use formula mode, not literal mode. The updated help page, with the extra warning, is already available in the web based documentation.