使用Mirth Connect将XML转换为HL7消息

I'm working with Mirth Connect v2.0 and getting stuck on one task, transformation of XML to HL7 v3. I've connected to an Ms-Access Database (the hospital system is in Access), I've set up the channel and set the Connector Type to File Writer in the destination tab. When I deploy the channel I can see the log file is populated with the records in XML format, now I'm stuck on how to convert/transform the XML message to HL7. Any pointers out there? I'm working with Mirth Connect v2.0 and getting