What is the name you are trying to create? What are the names that are already defined?

Don't worry about the quotes, it doesn't matter if Excel adds them.

It might help to attach your file. The paper clip icon does not work for attachments. To attach a file, under the text box where you type your reply click the Go Advanced button. On the next screen scroll down and click on Manage Attachments, which will show a pop-up window to Select and Upload a file. Then close the window.