"We know we are not doing as well in the league and we must improve, but the FA Cup and Champions League are different competitions and we can beat anyone," said the Reds boss.
"We have a difficult game, and I say difficult because we have some experience in the Cup. Everybody says that we'll beat Barnsley but we must be careful and do the right things.
"Always when you play a team from another division you must still do your jobs properly. We have the game against Havant and Waterlooville as experience. We were thinking about scoring goals and we conceded.
"We knew before that game about the dangers, and if you remember we had a chance to score first with a Yossi Benayoun header. In this game we must not give the other team any options.
"Clearly this is a cup final for them, so it's a tough game. We also know they are physically very strong, so we must be careful. We have to give them a lot of respect.
"We have to score first and everything will be okay."
