Admin unable to set Category

When editing a Hika Menu from the back-end, Associated category doesn't work. Category selection dialog pops up and allows selection of a category, but there is no commit button visible. Can only cancel the dialog. Wher might the problem be?

Running Joomla 1.7.7 and HikaShop 1.5.5

Hi,

Could you do a screenshot ?

Panel allows changes, but will not save them.Screenshot attached.

What happens if you click on the + sign of a category ? Does it get added to the product categories ?

Well, I'm a lot taller than I feel right now. Of course that works. Wasn't thinking in terms of being able to select multiple categories, so I just overlooked the "+" sign.

Thanks.