what am I doing wrong?
Anyway. Try without a config file:
cgminer --scrypt -o stratum+tcp://eu.middlecoin.com:3333 -u 15r271ADbvPkCcENraokEzrRgLrmaSpfc8 -p x --thread-concurrency 8192 --intensity 13 --worksize 256 -g 2 --gpu-powertune 20 --gpu-fan 0-85 --gpu-memclock 1500 --gpu-vddc 1.17 --gpu-engine 1050 --auto-fan --auto-gpu --temp-target 80