Surely you meant "wrongly".
Nope, I meant "wrong" which is commonly used as an adverb in the US in informal communication (I consider forums to be a place of informal communication). Since folks here like "proof" in the form of links and pictures, here are some:
http://grammarist.com/usage/wrong-wrongly/
http://www.oxfordlearnersdictionaries.com/us/definition/english/wrongly
Wrongly is, of course, also correct, and more correct in formal writing and conversation, and in the UK.