Voicemail update status on the phones problem


Sorry if that problem has already been there or it’s not the best place to ask for help but I don’t even know how to ask google to find an answer.

Basically when I have got a voicemail message my phone (SPA-941) updates the line status and displays an envelope icon informing me I have got a message. When I log in to my voicemail, listen to the message, delete it after all… my phone is not being updated about the mailbox status. It stays “red” with the envelope next to the line button. I have to reboot the phone to update mailbox status.

I have got registry expires set to 60 sec and voice mail server set to IP:5060.

What did I miss ?

Thank you for your help in advance.