Using IDocs for Time Data transfer between SAP and Kronos

Has anyone had luck with using IDocs with Kronos...

What we are trying to achieve is sending the Mini-Master, Time Event Groupings, and Trigger to Kronos and then receiving the Time Events data back into SAP...

For some reason Kronos is saying that they do not knot what IDocs is and they have never worked with it...(surprisingly they are SAP certified)

Has anyone worked with Kronos in exchanging Time Events data? How did it go for you... Any tips you can offer us...

Thank you in advance.

- Harshal Soni