Snapshots not working

Hello, We have purchased a ReadyNas RN4200X unit for use as a network shares. Any of the original shares that I created on this unit are taking snapshots according to their schedule correctly. Any of the newer shares that I have created, the snapshots are not being taken. I have tried changing from Daily to Hourly to None and back to Daily and they refuse to work. There is nothing showing in the log that the system even attempted to create a snapshot of these newer shares. The log does show the older shares having snapshots taken and the older snapshots removed. I also cannot take a manual snapshot of ANY share. If I attempt to, I get an immediate error stating 'Snapshot 'test' is failed to create for share or LUN 'Public'. (The poor grammar is not mine!) If I look at the logs, it has this record in it: snapshot: Snapshot 'test' is failed to create for share or LUN 'Public'. We need to be able to rely on these snapshots in case we have to revert back to a previous version of a file, or if someone inadvertently deletes something. Unfortunately, I am 12 days past the 90 day limit for phone support. Please let me know what can be done to fix this problem.

Thanks, Jim Cook