Dropdown topmenu dissapear when hover in ie

I’m having issues with the topmenu dropdown on www.kwarto.be. When hovering for example first category “CARTRIDGES EN TONERS” you can’t get to the second level categories. They dissapear when hovering. No chance to click them. Same with last category “TEKEN EN HOBBYMATERIAAL”.



Changed following css in dropdown.css, but no help:


<br />
/* Drop to right */<br />
.dropdown-multicolumns li:hover .dropdown-1column,<br />
.dropdown-multicolumns li:hover .dropdown-2columns,<br />
.dropdown-multicolumns li:hover .dropdown-3columns,<br />
.dropdown-multicolumns li:hover .dropdown-4columns,<br />
.dropdown-multicolumns li:hover .dropdown-5columns {<br />
top: 22px;<br />
left: -1px;<br />
}<br />