Help Regarding Providing Security in Application

[Santhana Lakshmi.S]

I am doing an application in J2me.In j2me,it is possible to transfer the application from one mobile to pc and from the pc to another mobile using USB Cable.
My application is not a freeware and the user has to buy it.If a user buys,then it is possible to transfer the application from his/her pc to "N" number of mobiles.
i want to prevent this kind of transfer.if one user downloads the application then how can i prevent the user to transfer the application to more than 1 mobile?
Can anyone help me in sorting out this problem?