each time I build program, data is lost

I am using visual basic 2008

I am making a program, I used sql server compact edition (sdf) (i think it is no more only for mobile device, I am working for desktop application)which i created with the same visual basic. i update data by using table adapters,

when I close the program and build again, the data previosly updated are deleted, and I get empty database? why is that. do i need to set some copy to.........properties. i have used copy if new.

I want to add something to it, that when I manually entered data, they are not gone. But when I entered from form, next time the data lost.|||

See this: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2115234&SiteID=1