Broken Slash Storm

i logged on to train my level 49 DB today and found that Slash Storm was no longer working. i tried assigning it to other keys, and even double clicking it, nothing. does anyone else have this problem and/or know how to fix it? i can't do anything on my db without slash storm and it's really getting on my nerves.

i did pass the level 20 cs skill book and get the extra skill point, if that's important. but that was ages ago.