Have you tested to make sure it's working otherwise? Call your number, let it ring to VMS, leave a message, dial in and verify that that message is waiting for you.
You might want to call in to customer service to see if you have the audible message waiting indicator feature on your account.
Fiber Solution Center
Notice: Content posted by Verizon employees is meant to be informational and does not supercede or change the Verizon Forums User Guidelines or Terms or Service, or your Customer Agreement Terms and Conditions or Plan.