I’m sorry to hear you’re having problems sending MMS messages. I’d be more than happy to assist you and get your Anywhere application functioning as expected.
For starters, can you open a ticket via the Anywhere app on the afflicted device so can are able to get logs from the application and a better sense of what’s happening? (Please make sure to note if you are “signed-in” when you go to submit a ticket from the application)
After you’ve opened a ticket, make sure to take a look at the steps @kwhite outlined below and reply back to this post and we will take a look!