Something else could be even though it' s brand new string and cable is that you' re assuming they must be the right length. We' ve been getting in bows at the shop I' m at now and one I used to work at that had different length strings and cables on then what was called for (the one a few days ago had a 3" shorter string on-yes 3" ). Not saying that is the problem but this is why I like doing my own work so I know for sure.