unsuccessfully
adverb /ˌʌnsəkˈsesfəli/
  /ˌʌnsəkˈsesfəli/
 - in a way that is not successful; without achieving what you wanted to
- She tried unsuccessfully to impress him.
 
Oxford Collocations DictionaryUnsuccessfully is used with these verbs:- appeal
 - battle
 - challenge
 - …