Ok, things to check (or double check):
1) check brackets and see they're spaced right (with the {} button) in the proper file that has the alias (you can have mirc do a "search all file" for it in the popups/remotes/alias section)
2) something else to consider:
alias checkops{
alias checkops {
Those two above are NOT the same thing. The first alias is called checkops{ where the second one is called checkops. In the case of the FIRST name, there IS a { there but it's not recognized by mirc.
Hope that helps