The club yesterday confirmed their marquee signing would miss the entire 2011/12 A-League season due to surgery required for a new knee injury he discovered just days before he was due to make his return from knee surgery in the off-season.

Now the Jets have also admitted they are not covered by insurance for the injury - and owner Nathan Tinkler will have to cover Culina's $800,000pa salary out of his own pocket this season.

"I've had a lot of sleepless nights," Culina admitted to a packed media conference in Newcastle today.

"Especially coming to a new club you expect things to go accordingly but I have hit a speedhump at the moment, but I am fully confident of coming back and giving back to this club."

The 31-year-old Socceroos star explained that the new injury was not a recurrence of the old injury and was not in any way brought on by his previous surgery or his rehabilitation program.

"I was back at training and was progressing well, and then I felt a different pain,' he said. "It is not a reoccurrence of the injury, it is a new one. It is due to my knee being out of alignment.

"When I look at my rehab I can tick every box and say that I have done everything correctly. Unfortunately something like this has happened.

"I will have surgery next week and trying to get back to the park as soon as possible."

The Jets have come under fire in recent days for signing Culina when he was injured and the announcement that the latest injury is not covered by insurance as it is the same knee he had surgery on in the off-season.

The end result is club owner Tinkler will have to foot all the medical costs as well as pay Culina's wage even though the talented midfielder will not kick a ball this season.

"I understand the frustrations of the fans and I am extremely devastated that I won't be taking part in playing this season," Culina said.

"I know there will be some negativity but I can't listen to that I just have to get on with my rehab, and get back on the park as soon as possible.

"We went through all the option and tried everything ad this is the last resort I would love to be on the park, playing football is what I love to do, so surgery is not what I want but it is what we've come to."

He added: "No-one should doubt my commitment to the Jets and there is no way anything is going to stop me coming back to play at the highest level.

"I knew exactly what I had done (with the off season injury) and the club knew that as well. I had all the confidence, as the club did, of recovering and I was 24 hours away from playing my first match.

"Unfortunately it has come to this. But I am confident coming back to a very high level and my aim is to play for Newcastle and keep playing for the Socceroos."