[Blades]

Game mode doesn't start because you set time to 5, which is 5 milliseconds.
Try multiply 1000 miliseconds with 60 (which will be 1 min) then multiply in how much minutes you want, in your case 5 so 300000.

Or as i see if you use this as a filterscript add the timer on OnFilterScriptInit and remove ongamemodeinit completly.