Bailey Cupboard Door

Hi All

We have a bailey senator wyoming 2003. There is a cupboard just beside the bed which has a roller shutter. The problem is the door will only slide about 6 inches before it comes to a dead stop. Inside the cupboard there is a panel which covers the roller, there are no visable screws to gain access on the panel or the top or below the cupboard. Any ideas would be welcome.

Thanks John