He told the official website: "It's far from easy to bring players in and the bottom line is that we don't want to sign anyone who is not going to improve the quality of the squad we have here already."
Forest travel to Cardiff on Saturday looking to end their dire run after falling into the relegation zone on Wednesday night.
First-team coach Ian Bowyer is looking to the Forest faithful to help the Reds towards three points.
He said: "Being a professional footballer means you have to go out and perform in different environments and although we might not have as many supporters as Cardiff there on Saturday, our away support has been fantastic all year."
Forest fans are urged not to travel to Ninian Park unless they already have a match ticket. No tickets will be available on the gate.