Do you submit shares?
Please show some output like this:
MMC Agg. SPM: 6.788, HPM: 6.792; Rnds C/I: 5890/697, Don. C/I: 71/21; Cfg/Wkr SPM: 6.788/1.7063, Cfg/Wkr HPM: 6.790/1.6975 5961 rnds AV=2, ART=35346
work.mmcpool.com: On-line, Shares Submitted 1569, Accepted 1533
erebor.dwarfpool.com: Idle, Shares Submitted 26, Accepted 26
moria.dwarfpool.com: Idle, Shares Submitted 0, Accepted 0
Problem solved, by itself. I swear - for a week it didn't work suddenly it does, nothing changed from my side. Running it for 5 minutes now and shares are being submitted. I guess there was some other issue "out there".
Thanks for trying to help.