Assuming now that your trailer is nose-high, do you have adjustable shackles on your trailer? If you do, and they are adjusted so that your trailer is as high as it can go, then you may have to follow Forrest's advice or seek out a knowledgeable trailer mechanic.
For the record, what make/model 5er are we talking about? This way we can put all your information together and maybe get some additional advice from others.