Did you retrieve R & S from the values:
3045022100b269391bd0d72ab3c462a0f6797ba48db1fa3c4f47772c6afcea8df996a062080220118a805b801d4df83913589e34231405c0087f827da903bbd96e3e06cc27c0fa[ALL]
3045022100ffae9be052263d9e1f0293fdeee3a3dfaf3e5f57d9c3bf61a75aa6c2ae680d14022044acb8de3710f2524c7d43ee3be8cc2cddb178d8f25dff27e45ed5621ff41ec4[ALL]
3046022100896324077e81aa06ee4b61d2f7d769a7726fd1b0d468c7599038e9c279954b2a022100d99dd8fc7d32cdf025cba3bd80ed51a6dbf860da29eb506c40016f22a19efc42[ALL]
Then just apply calculations for Z