Sending message to pager

I need to send messages to a Pager using the SO_NEW_DOCUMENT_SEND_API1. I’ve already configured at SCOT in pager’s node the pager company’s domain (@mobi.com.br*). At SU01 I’ve set communication type as Pager Services. But whe I execute my program nothing happens. The email doesn´t goes to the list at SCOT.

I don´t know it it’s has something to do with the function. I’m passing ‘U’ to SOMLRECI1- REC_TYPE.

Thanks in advance