PacsOne Server

Hi,
I'm trying to explore the PACS. I've performed a test-run that sends a HL7 message to the PACS it receives it and then it forward it to the destination application. The problem is that PACS keeps on sending the the HL7 messages and in the end my destination application is flooded with so many HL7 messages. how can i restrict PACS to send it only once?
And I'm still unable to view HL7 message in PACS any pointers in this regard will be really helpful.

thanks,

Do you know if the receiving HL7 application is using the Enhanced ACK or regular ACK for acknowledgement of received HL7 messages?