Hi,
Yes you can use just WAIT. COMMIT was to ensure that data is available in database.
You message might be getting supressed by any other messages that are generating after it.
In the whole process, if there are several messages, usually only the last message will show up because animation for displaying a message takes about 2 seconds, while the whole process completes in less than a second so the messages are displayed but before the first message could show up it gets overwritten by the next message and therefore only the last message is visible.