Default [Q] Problems with Easy Rooting Toolkit

Hi. I'm new with this rooting thing (only rooted a phone once, and only because the process was very easy), so i wish you could help me.

I'm tryin' to root my Xperia SP (C5303) using the easy rooting toolkit (the lastest version), but when i run the .bat file and press any key, the process never ends. Sometimes it stucks in a "Waiting for Device" message. Sometimes, in a "daemon started succesfully" message. I guess that's because the file doesn't recognize correctly my device, but i don't know exactly where's the problem. I saw some people having the same issues but i couldn't found any way to fix it.