Maybe there is an issue with dtsm and the zpool stratum ? also what cmdline do you use to start it ?
Have tried using zm.exe --server equihash.mine.zpool.ca --port 2142 --user 17g2APRaoDz17mM4Vw9R1hSR6juVnKXGrk --pass x --telemetry 127.0.0.1:2222 --time
and zm --server equihash.mine.zpool.ca --port 2142 --user 17g2APRaoDz17mM4Vw9R1hSR6juVnKXGrk --pass x --telemetry 127.0.0.1:2222 --time
Both were the same, didn't returned any shares.