Strange problem rendering fields in fieldset

[gogofe]

Hy:

I have a fieldset not collapsed inside a FormPanel and this FormPanel is collapsible. So when I render this formPanel collapsed, when I expand it, I only see the labels of my fields (see image _1287857519909.png) inside the fieldset but when I render this formPanel not collapsed I see the labels and the fields ok(see image_1287857549501.png). Why?

Thanks

[Condor]

Can you post the layout of your formpanel and fieldset?