Yeah... there's definitely an issue. You authorize fine, submit a few shares fine, then BAM you're sending massive quantities of rejects. The reason the pool looks dead? It bans you because of flooding. The following are snippets from the pool stratum server logs. Passwords and IP addresses removed
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2016-02-16 14:14:50 [Pool] [bitcoin] (Thread 3) Authorized nortron.s2: xxxx
2016-02-16 14:14:52 [Pool] [bitcoin] (Thread 3) Share accepted at diff 1042/1392.47875174 by nortron.s2
2016-02-16 14:14:56 [Pool] [bitcoin] (Thread 3) Share accepted at diff 1042/1663.54685942 by nortron.s2
2016-02-16 14:15:15 [Pool] [bitcoin] (Thread 3) Share accepted at diff 1042/1408.90212059 by nortron.s2
2016-02-16 14:15:18 [Pool] [bitcoin] (Thread 3) Difficulty update to diff 453.04347826 workerName="nortron.s2"
2016-02-16 14:15:28 [Pool] [bitcoin] (Thread 3) Share accepted at diff 453.04347826/8109.63273026 by nortron.s2
2016-02-16 14:15:29 [Pool] [bitcoin] (Thread 3) Share accepted at diff 453.04347826/7413.46597719 by nortron.s2
2016-02-16 14:15:40 [Pool] [bitcoin] (Thread 3) Share accepted at diff 453.04347826/2728.61401655 by nortron.s2
2016-02-16 14:15:47 [Pool] [bitcoin] (Thread 3) Share accepted at diff 453.04347826/1405.38320558 by nortron.s2
2016-02-16 14:15:50 [Pool] [bitcoin] (Thread 3) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":453.04347826,"error":"low difficulty share of 1.4178721372176153"}
2016-02-16 14:15:50 [Pool] [bitcoin] (Thread 3) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":453.04347826,"error":"low difficulty share of 2.2534057741723235"}
2016-02-16 14:15:50 [Pool] [bitcoin] (Thread 3) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":453.04347826,"error":"low difficulty share of 2.299571152495193"}
2016-02-16 14:15:50 [Pool] [bitcoin] (Thread 3) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":453.04347826,"error":"low difficulty share of 1.610991188080095"}
2016-02-16 14:15:50 [Pool] [bitcoin] (Thread 3) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":453.04347826,"error":"low difficulty share of 1.9361901540633337"}
...
2016-02-16 14:15:53 [Pool] [bitcoin] (Thread 3) Banned triggered for nortron.s2 : 492 out of the last 500 shares were invalid
2016-02-16 14:16:53 [Pool] [bitcoin] (Thread 4) Authorized nortron.s2:xxxx
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Share rejected: {"job":"ade0","worker":"nortron.s2","difficulty":1042,"error":"job not found"}
...
2016-02-16 14:16:58 [Pool] [bitcoin] (Thread 4) Detected socket flooding from nortron.s2