jcoidoc

Hi

I m using the example JCoIDocSample3 and it seems to work when I execute a function call, but I can´t recievve idocs

Server exception occurred: com.sap.mw.jco.JCO$Exception: (120) JCO_: JCO.Server could not find server function 'RFC_REMOTE_EXEC'

Must i configure something in my SAP system??

Please i need some help

thanks in advance