Oguzhansevim, once you click Is Solution, the Discussion is marked as Solved and many members and ANSYS staff who look for discussions to read and answer will not open a discussion marked as Solved.

If you want people to read your last question, I recommend you delete the post above that, which has the green check mark indicating that the discussion is solved.  Once you delete the post, the discussion will show as active and not Solved.

Finally, when you choose a post to click the Is Solution link, it is better to click that link under the post that has the best answer to the question asked.