You can mine directly from wallet:
Go to Help.
Click Debug Window.
This is the console where you will execute all commands.

Type this command to start mining:

setgenerate true -1
If you want to use a specific number of CPU cores, instead of -1, type the number of cores.

You can then type the following to see the status of generation:
getmininginfo


Else let me know which miner software you running and i can assist you to configure that, works with cgminer or other aswell.
Example:
cgminer.exe -o http://127.0.0.1:37424 --scrypt -u user -p password

Best Regards IMPS