Question concerning my modified Timer

Hi,

im using this timer right now, which is a modified version of the prokreedz timer, but i have some problems with it.

When my climbtime/finishtime is below 1minute it displays the time correctly in this format 00:0.000 (e.g 00:13.256).
When my climbtime/finishtime is over 1minute it displays the time a bit mixed up, the minutes are correct but the seconds as well as the miliseconds are messed up. Format displayed - 00:000.000000 (e.g 02:120.125921)

If someone can help me how to fix this "lil (I hope its only a little one)" problem I would be very happy :)

greetz sonq, ty in advance

ty very much SchlumPF, I hope I'll learn somethin' and improve myself, (hope u'll be there for further questions :P ) thx again <3