I'm having an issue with voicemail maybe can help me with. Even when I have set the option to "Send as attachment and delete from mbox" I get a BLF notification in my phone I can not clear. I'm missing some setting I should set to avoid this? How can I recover from this as I have no messages in the mbox but I still have the light and mbox icon on the phone. The phone in use is an SPA504G from Cisco. I don't remember having this issue before but I can pinpoint if it's since v11 or some of the SPs that appeared. Thanks!