[23:52:53] Started sgminer 5.1.0
[23:52:53] * using Jansson 2.7
[23:52:54] Probing for an alive pool
[23:52:54] eu.p2pool.pl difficulty changed to 0.060
[23:53:54] No servers were found that could be used to get work from.
[23:53:54] Please check the details from the list below of the servers you have input
[23:53:54] Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers
[23:53:54] Pool: 0  URL: stratum+tcp://eu.p2pool.pl:9171  User: **************************  Password: password
[23:53:54] Press any key to exit, or sgminer will try again in 15s.
[23:54:09] eu.p2pool.pl difficulty changed to 0.060
[23:54:10] No servers were found that could be used to get work from.
[23:54:10] Please check the details from the list below of the servers you have input
[23:54:10] Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers
[23:54:10] Pool: 0  URL: stratum+tcp://eu.p2pool.pl:9171  User: **************************  Password: password
[23:54:10] Press any key to exit, or sgminer will try again in 15s.

whats wrong?
cpu-mining on that pool works fine
sgminer.exe --no-submit-stale --kernel Lyra2RE -o stratum+tcp://eu.p2pool.pl:9171 -u ************************** -p password
R9 270 / Catalyst 15.7.1