I can get this miner working directly to a pool. however, MiningRigRentals will not connect.

Any ideas as to why?

this in the consol:

""02:21:47 Connected to us-east01.miningrigrentals.com:3333
02:21:47 Subscribed to Stratum Server
02:21:47 Set Nonce: f800002e
02:21:47 Authorized on Stratum Server
02:21:47 Connection Error: End of file
02:21:52 Connected to us-east01.miningrigrentals.com:3333
02:21:52 Subscribed to Stratum Server
02:21:52 Set Nonce: f800002e
02:21:52 Authorized on Stratum Server
02:21:52 Connection Error: End of file
02:21:52 All user mining pools are unavailable
02:21:53 Miner terminated, watchdog will restart process after 10 seconds""