Why does the program crash when I try to apply overclocking? Please help.

EthDcrMiner64.exe -epool us2.ethermine.org:4444 -ewal 0x54DAcC4a74d5C75f0184E9093c210E6313ACc6Ed -eworker rig1 -epsw x -esm 1 -mode 1 -tt 60 -cclock 1100