image doesnt display correctly?

Hi anyone c an help me whats wrong with my code.. Image doest display if the remarks is incorrect in my asp.net page.. check image always display even the remarks is in correct, pls help me.. heres my code, thanks

  SqlCon.Open();
            SqlCommand sc_quest = new SqlCommand("SELECT *  FROM tblApplicantAnswer INNER JOIN tblQuestion ON tblApplicantAnswer.questionId = tblQuestion.questionId AND tblApplicantAnswer.categoryId = tblQuestion.categoryId WHERE tblApplicantAnswer.applicantId ='" + l_appid.Text.ToString() + "' AND tblApplicantAnswer.categoryId=" + l_catid.Text.ToString(), SqlCon);

            SqlDataReader sdr_quest = sc_quest.ExecuteReader();
            
            sc_quest.Dispose();
 while ...