Redknapp said: "I can't understand how teams that are mid-table and not going to get in to Europe just don't go for it. I don't know why they don't care about it.
"Birmingham won it last year. What a great day for them that was.
"I will do it by juggling my team around if I can because we are in Europe but I will go there tomorrow with a team that I feel can win the game.
"Once we push on in the competition I will be looking to win it."