Problem with Cure Curse

[Silthian]

I'm having a problem with the icon for curse. Quite often I click on it and absolutely nothing happens. Sometimes it corrects itself within a few minutes and starts working again, other times it stops working completely. The only way to fix it is to delete / redownload Darqui when that happens. I've tried assigning curse to one of the 5 spell icons in the group window and that too occasionally stops working. I click it and nothing happens. It isn't lag, the spell is not in the process of refreshing, I'm not being interrupted....it simply doesn't work.

Anyone else encountered this or know of a way to fix it?

Thanks.

BTW, after I delete / redownload, it only works for a few days before the problem begins over again.