The brakes reach OK in the rear? Is the fork the same color as the frame? Perhaps you either got a fork designed for 27" wheels or an older 700C fork that needs a long reach brake.
How did you drill the brake bridge? did you get a right angle drill and short bit? or i think it is called a blind bit that goes in the hole before attaching to the drill?
If you just bored the hole through from the outside (now both holes are big) I would not use that frame. There is a good chance the brake will pivot in the large hole and not work correctly.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk