travelin_cat - 4:32 pm on Aug 1, 2009 (gmt 0)

One of the reasons the code could be grayed out in "Design" mode is that the source code is referencing an outside source, such as a style sheet.

Look at the source and see if you can find a reference to another document such as a style sheet or javascript.

If you can get the other document and make sure the doc you are working on can reference it, you should be able to make changes to your project.