Configurator cs4 panel vertical resize limit

Hi,

Maybe this has been mentionned before but when I try to make a custom panel for photoshop Cs4,

the panel appears to have a vertical limit when resizing which is much larger than the one I've initially created.

For example this one has been created at 71 x 94 and cannot be resized vertically anymore than the screenshot .

Docked or not is the same thing

I have  also tried other sizes for the original panel.

Anyone has an idea?

Thanks,

Marc