Hello Kim, thank you for reaching out. We are sorry to hear about your issue. It sounds like you may be using this Maestro Companion Dimmer with an MACL-153M Maestro LED+ Dimmer? If so, and you are experiencing the problem you described, the device likely just needs a simple reprogramming in order to properly communicate with the companion dimmer. See this procedure on page 2, step 9 of the following document:
https://www.lutron.com/TechnicalDocumentLibrary/0301629b.pdf
(Note: this instruction shows changing the programming for use with a mechanical 3-way switch. You will want to change your dimmer's programming to the middle indicator light, number 4, for use with a Companion Dimmer, as noted in the document.)
We hope this helps! If you require further assistance, our 24/7 support team is happy to help. We can be reached at 1-844-LUTRON1 or by email at support@lutron.com.