element name for each operation must be unique.
<xsd:element name="StationSearchParameter" type="tns:StationSearchParameterType"/>
declare one more element with same type
<xsd:element name="StationSearchStatusParameter" type="tns:StationSearchParameterType"/>
and use this element in your wsdl
like
<wsdl:message name="getStationStatusRequestMsg">
<wsdl:part name="input" element="tnsx:StationSearchStatusParameter"/>
</wsdl:message>
It must work without any issues.