Speaking to the Official Club Website, former West Ham and Manchester City midfielder Horlock said: "It was good to get the three points on Saturday but there are still things that we need to work on.
"It's important to get a good start in this division and we are up and running now but we need to build on the result against Gillingham.
"Forest will be a difficult match for us but we will go there and work hard at our game and look to make it six points from six."