Dena,
To confirm:
– You can get to your messages page, you can read individual messages, you can type in the box to reply, but when you hit Enter/Send the text box goes blank but the text you typed doesn’t appear in the window?
Yes/No?
If yes then send me a PM to test, include the exact time (your local time) in the message so I can see if there is a big delay or not. Ignore the fact the text you type doesn’t immediately appear as a sent message.
If no then please walk me through the problem step by step.