actually you just need to do /circle unpause most likly, they changed the commands for that plug in take a look. I use it a lot, now you can just /circle 90 loc, loc, and if you want to quick pick up some mobs outside of that radius just use your arrows, soon as you press one your circle will stop, just run out in a loop and pick up the straglers, and come back to somewhere close to your circle path, making sure to be ahead of the pack you just pulled, then have a hot key for /circle unpause. You will start re-running that circle. If that doesn't work for you pull up the circle command by typing /circle list and make sure the settings are set for circle mpause are set to on. I suppose if you set that to off it might make it work like before, but I find that this way is much better.