Anyone can help me out here please? Everytime I run my project right after I open VB, the timer runs fast specifically the timing from 1 second to 2 seconds.

This is what I just put a value in my textbox and then run it....The next time I run the app (without closing VB program) then the problem will not occur but the moment I close VB and re-open it and run the project then the same problem occurs....Why is this so?