Connection String Problem

Hi every one, I've been done a project and i want run it on another device but its need the server name inside connection string that i used in the system which i made up the project, and it also does not support (".")
sign to recognize the database file and run the project,
eg: its not accept Data source=.; Initial catalog=DB-name; Integrated Security=True;
it just need own server name.
now what do i do? Please help me!!