Hi dragonmike,
you can add either -d 2 3 4 or --cuda-devices 2 3 4 like this sample:


TradeTec-MinerCmd -A PROGPOW-100 -P YOUR_WALLET.YOUR_WORKER@SERVER_ADDRESS:SERVER_PORT -d 2 3 4


Please note that you can also add more -P YOUR_WALLET.YOUR_WORKER@SERVER_ADDRESS:SERVER_PORT parameter as backup pools.
Let me know if that works or if there are still issues.

Happy mining!