Captain Rio Ferdinand scored the opener with a header in the second half - and two goals from Wayne Rooney, an own goal by Alexandr Kuchma and a late effort from Jermain Defoe cemented England's position at the top of Group Six.

But Cole was the target for jeers, after his wayward pass had led to Kazakhstan's lone goal from Zhambyi Kukeyev.

Capello said: "I couldn't understand the crowd booing Ashley Cole after he made a mistake. It is possible for one player to make mistake. It is very important that the crowd help him and not boo him.

"But the crowd was very strong for us. After the first half, they helped us a lot."

Capello admitted England struggled in the first half with a 4-3-3 formation - Rooney wide on the left - which is why he brought on Shaun Wright-Phillips for Gareth Barry at half-time and reverted to 4-4-2.

He said: "We needed a speedy player on the left, and he did very well. In the first half we played too quick, tried to get the ball forward immediately and made too many mistakes.

"In the second half Rooney played nearer (Emile) Heskey and he played very well. After the first 45 minutes, I was not happy.

"Kazakhstan had two chances in the match, but it is normal in international matches that opponents have chances to score goals."

Capello revealed John Terry may have recovered from his back injury in time to face Belarus on Wednesday.

"I hope he will be okay," he said.

"Belarus are a good team. I saw them play against Ukraine; they are a dangerous team who play well. It will be a dangerous game."

Kazakhstan's German coach Bernd Storck believes England were flattered by the scoreline - and revealed that the players had to buy studs in England during the week, because replacement studs are not available in Kazakhstan.

Storck said: "We were unlucky with the result but happy about the way we played. In the second half, we did not concentrate for their first goal - and that was a big mistake.

"Before that, we had a great chance - and if we had scored we would have seen then what might have happened with the England team. But instead they went and scored."

Storck blamed Kazakhstan's lack of stamina for fading late in the second half.

He said: "Our endurance is not so good. We must work a lot in this area.

"We played good football in the second half but we were tired and we made mistakes.

"I have a very young team. We are here to learn. I played six players from the under-21s. Four of them made their debut, and I think it is a big success.

"This is the future for Kazakhstan. It is a good start for the future.

"I know we have a good team. It was very hard for England to play against us. We have good power - but when we lost the power they got the goals."

On the stud situation, he said: "In Kazakhstan we have no studs. When you lose studs you must buy them. It is a big problem."