Cannot connect to any pool to mine ETC

Set up flight sheet to Hiveos pool, using RX 570 4GB rig. Trying to mine ETC, using Team RedMiner. Cannot connect to the pool. Switched pools as well as miners, without any success. Different error messages on different pools, but pool always rejects the connection. Any ideas? The Hiveos pool pool error Log in should be valid hex address error code 32602