Problem with SLD on GeoServer

I can't find what is wrong. I try write an style on GeoServer.

This is not ok.:

    
                Odcinki
            
      Magistrala A
        
  1700
  6771
     **line.24**
        
         mpec_magis

         1
        
    
        
        
          #009933                   
          4
        
        
  

    
    6771
            **line.40**
        
         mpec_magis
         1
        
            
    
      

          #009933                   
          2
      
    
        

I have got errors:

line 24: cvc-complex-type.2.4.a: Invalid content was found starting with element 'ogc:Filter'. One of '{"http://www.opengis.net/sld":Symbolizer}' is expected.

line 40: cvc-complex-type.2.4.a: Invalid content was found starting with element 'ogc:Filter'. One of '{"http://www.opengis.net/sld":Symbolizer}' is expected.

I don't understand what is wrong, beyond it is LineSymbolizer.

My previous wersion without ScaleDenominator is ok.:

    
 
   Magistrala A
   
     
       mpec_magis
       1
     
   

   
     
       #009933
       2
     
   
 

For any suggestions many thanks. I greet

Answer

XML is ordered (at least in the SLD schema) so you must use the elements in the right order, what you should have written is:

 **line.24**
    
     mpec_magis
     1
    

1700
6771