Double-check your quotes (of both flavors, if applicable).
Double-check parens, braces, brackets.
Post (cut and paste) code so other sets of eyes can actually see possible causes.

And re your breezy "Sorry 'bout that, but that's how we learn, right?:
while learning from one's errors is a valuable approach, so too is reading the docs when some "wise one" tells you the case or usage is something different than you thought. [ Been there, took a while to learn to do that :-( ]