Mark's answer covers it.

To elaborate a bit: what is seemingly the same question can be a totally different one; identical symptoms can be caused by different reasons. Unless one answer covers multiple causes and their solutions, they are separate questions.

If another question has an accepted answer, OP implicitly mentions it worked for him or her. If it doesn't for you, your question is obviously a different one.

##Note reviewing on dupes is the most likely category to make mistakes on; reviewers have to read thoughtfully and concentrated to decide, which is, unavoidably, not always the case. The keyword is therefore: communication. Clearly mention in the question that you tried the seemingly- dupe and why it didn't work for you, then it should be fine.

Mark's answer covers it.

To elaborate a bit: what is seemingly the same question can be a totally different one; identical symptoms can be caused by different reasons. Unless one answer covers multiple causes and their solutions, they are separate questions.

If another question has an accepted answer, OP implicitly mentions it worked for him or her. If it doesn't for you, your question is obviously a different one.

Note

reviewing on dupes is the most likely category to make mistakes on; reviewers have to read thoughtfully and concentrated to decide, which is, unavoidably, not always the case. The keyword is therefore: communication. Clearly mention in the question that you tried the seemingly- dupe and why it didn't work for you, then it should be fine.