incorrectly vs incorrect

incorrectly is not an adjective while incorrect is an adjective.

Word	Noun	Adjective	Verb	Adverb
incorrectly	No	No	No	Yes
incorrect	No	Yes	No	No

incorrectly (adjective)	incorrect (adjective)
	not correct; not in conformity with fact or truth
	not in accord with established usage or procedure
	characterized by errors; not agreeing with a model or not following established rules
	(of a word or expression) not agreeing with grammatical principles

incorrectly (adverb)	incorrect (adverb)
in an incorrect manner
in an incorrect manner