[phenixbb] Not Updating Waters

Hi all, I am having an issue during refinement when using Phenix Refine. Every time I try to "update waters" it does not place or update the waters. My structure is 2.72 A. Is the resolution not good enough for this feature? If anyone has ideas, or if I need to supply more information, I would be happy to oblige as I am fairly new to the field and still learning. Thank you in advance!