XML : Invalid content was found starting with element 'sport'. One of '{spalanie}' is expected

I've been trying to solve this issue, but I can't understand where it comes from:

Invalid content was found starting with element 'sport'. One of '{spalanie}' is expected.

Here's part of the XML:

      <?xml version="1.0" encoding="utf-8"?>  <spinning>    <tabela>      <porownanie waga="45">        <sport>Bieg 11km/h</sport>        <spalanie>610</spalanie>        <sport>Skakana</sport>        <spalanie>500</spalanie>        <sport>Pływanie 50m/min</sport>        <spalanie>325</spalanie>        <sport>Spinning</sport>        <spalanie>800</spalanie>           </porownanie>   </tabela>    

Here's the following XSD:

  <xsd:schema version="1.0"              xmlns:xsd="http://www.w3.org/2001/XMLSchema">        <xsd:element name="spinning" type="spinning_typ"/>    <xsd:complexType name="spinning_typ">      <xsd:sequence>        <xsd:element name="tabela" type="tabela_typ" maxOccurs="unbounded"/>        <xsd:element name="zapisy" type="zapisy_typ"/>        <xsd:element name="sprzet" type="sprzet_typ"/>      </xsd:sequence>  </xsd:complexType>        <xsd:complexType name="tabela_typ">      <xsd:sequence>        <xsd:element name="porownanie" maxOccurs="unbounded">          <xsd:complexType>            <xsd:sequence>              <xsd:element maxOccurs="unbounded" name="sport"/>              <xsd:element maxOccurs="unbounded" name="spalanie" type="xsd:decimal"/>            </xsd:sequence>           <xsd:attribute ref="waga"/>          </xsd:complexType>        </xsd:element>      </xsd:sequence>    </xsd:complexType>