Ubercart

On the homepage and other created pages, the callback button works fine, but in the product catalog, when clicking the callback button, instead of the callback order form, product categories appear in the window. If I am at the address vivostar/catalog/, then when hovering over the callback button, the URL looks like vivostar/catalog/callback?width=600&height=300 instead of vivostar/callback?width=600&height=300. The product catalog is created with Ubercart. The button was created using webform, webform_ajax, and colorbox_node.