Logischer PHP Fehler?

				$question = "SELECT A FROM Links";  
				$output = mysql_query($question);
				while($row = mysql_fetch_object($output))
				   {
				   $A = $row->A;
				   echo '&#160;<a href="?secondlink='.$A.'">'.$A.'</a>';  

							$secondlink = $HTTP_GET_VARS['secondlink'];  
							if($secondlink == $A)
							{
								$question = "SELECT B FROM Links WHERE A = '$secondlink'";  
								$output = mysql_query($question);
								while($row = mysql_fetch_object($output))
								{
								$B = $row->B;
								echo $B;	
								}		
							}				

				   }