Make sure start.bat file looks like this:
setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
PhoenixMiner.exe -epool eth-eu1.nanopool.org:9999 -ewal YOUR_ETH_ADDRESS/YOUR_WORKER_NAME/YOUR_EMAIL -mode 1

YOUR_ETH/ETC_ADDRESS - your valid eth address
YOUR_WORKER - simple short worker name (like worker01). Optional.
YOUR_EMAIL - your email address for notifications. Optional.
Don`t forget to set wallet, worker and email address to correct values.
Read the pool Help how to set, this is for nanopool etr pool