Invoke MBO from many devices concurrently

Hi.

I have a MBO created from a RFC in SAP used by the C#(.NET) native application. From my native aplication I invoked the MBO setting load parameters as Import parameter of RFC, next,  the native application executes findAll() for retrieve the data as export parameters of RFC.

This way is works good when is only one device movil, but my problem is when many devices invoke the MBO with differents load parameters, in the same time, because in all devices show the same data.

I want invoke this MBO from differents devices with differents load parameters, and retrieve in which device your data respective.

Thanks for your help !!!