youve got the gear cables the wrong way round, right/rear sti unit goes to the left stop on the down tube then to the right guide under the bb, left/front sti unit goes to the right cable stop on the down-tube then to the left guide around and up the backside of the bb. they should cross under the down-tube. adopted by most mtb builders in the early 90s, to stop the sti/rapid fire cables being bent too acutely and slowing the shifting down.