Jon,

You would need to be a lot more specific about exactly the steps you're taking before anyone could venture a guess about what you're doing wrong.

See the tutorial I wrote:  Using the NVDA Dictionaries with Regular Expression Matching to Change Pronunciations (docx)

 

Even if you're not using a Regular Expression match, the steps are the same except for the radio button you'll choose if you are not doing a regular expression match.
--

Brian - Windows 10, 64-Bit, Version 21H2, Build 19044  

Tolerance is the positive and cordial effort to understand another's beliefs, practices, and habits without necessarily sharing or accepting them.

        ~ Joshua Liebman