No, you are not!
You are just looping blindly - your loop does not wait for anything!
You can’t do that!
After you send each message, you need to wait for the event that tells you that the unit is ready to accept the next message!
Think about it: if you were doing this manually, you would wait for the “OK” from one AT Command before sending the next - wouldn’t you?
Besides, doing stuff like this in a loop is never a good idea in Open-AT - you are very likely to end up triggering a watchdog reset!
(there was an entry about this in the FAQ/WIKI thread - but SiWi seem to have lost it: Lots of missing topics! )