Works on Emulator but not on phone?

I´ve made a program. It works perfectly on Emulator. When i make APK and install on my phone (Galaxy s3 9305) i get problems. More specific i can start the program but when i call a function that uses the (Select list item list)block, I get error message "Attempt to get item number two of a list of length one". I understand the error message, but its wrong and there is no problems on the Emulator.