Posted: 14/04/2017 at 16:40
Hi Ralph - the main problem with any climber is that they want to go up! You have to train the new growth horizontally, using wires or trellis for the stems to wind round, or be tied into.
You may have to bite the bullet and prune it back when it's finished flowering, and then tie it in where you want it to be, as new growth appears.
I have an alpina clematis which is flowering just now. It covers a fair bit of trellis against the fence, but left to it's own devices, it would simply have done the same as yours, and the flowers would be on my neighbour's garage behind, instead of where I want them