It's a Windows 7 64 bit system. This search within RTF files has never worked. It's beomce more of an issue because of bringing in these RTF files from CD. It won't even find them by name.
The files are under My Documents.
The file extension is set under the Indexing Options.
I have rebuilt the index with Index Properties and File Contents checked.
I have gone under Folder options and selected "Always search file names and contents..."