application program not working on another computer

Good morning all, I made a program which allows to read and record in a table the values of a balance connected to a computer. All this is in a state machine to be able to backtrack if necessary. the program works very well on my computer, when I transform it into an application on my computer it still works very well but once I change computer the application is very slow and especially the value of the balance cannot be displayed . I could not get the information from the balance but everything else works. What can this be? Thanks, have a good day