Hi and welcome to the forum. A climbing rose needs to be tied or anchored some how to help it grow upwards. It won't simply grow up the wall you have without something for the stems to hold onto.
You may want to buy a pillar that is much taller than the rose to help it climb. If the stems aren't secured to 'something' climbers will often just sprawl. It might be a good idea to google how to grow climbing roses. Also, there are lots of people in here who grow climbers ( I don't ) and they can give you better info that I can.
