Doesnt work at all

It does not react at my iPhone 3GS. I got an account and so on, but the only thing is to see the message "Login successful" ob my iPhone. Every other setting change at the app shuts off the app immediatly. Am I the no-brainer? Dont think so, spent a lot of time to read help, reinstall, etc. Not recommandable.

Axel Moering about Device Locator