I think you forget to put minutes in the minutes LED although you do remember it for the rest digits .So try this..
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poke PortC,%10000000 ' DP on first LED
Poke PortC,B0 ' Send segments to LED
Poke PortC.7,1
high PortA.2 ' Minutes LED
Pause 3 ' Leave it on 3 ms
low PortA.2 ' Turn off to prevent ghosting
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