I have and i installed it, thats why i came here having problems
What's your bat or conf file look like. Also in the cgminer folder try deleting all the .bin files that look kinda like this, scrypt130511Pitcairnglg2tc8192w256l4.bin Restart and see what happens. Every time you change the configuration, it makes a new
config bin file.
Which version are you using of cgminer? Such blind I gave up on the 3.7 versions and 3.8 doesn't support scrypt anymore so I stick with 3.5.0, rock solid.