[Asterisk-Users] Sending multi-line sms text

[Asterisk]

I can send sms messages just fine via a calling file, however, I cannot send
messages that have more than one line. How do I encode the message to 

This is line 1
This is line 2
This is line 3

* complains about 2 syntax errors (I presume because the calling file has
three lines for the message), and sends line 1.

Anyone had anything similar ?

Julian.