how to automatically trigger XML file port inbound processing ( iDocs)

hi,

i have defined a XML file port in SAP R3 with transaction we21.

In XML file port definition the inbound folder is set to ...\inbound\. When i put a file in the inbound folder, the file is imported into SAP after i manualy run the command startrfc.

what can i do so that the file to be imported automaticaly?

thx