Consuming SOAP webservice from k2 five core

Dear All,

I am trying to comsume SOAP web service from k2. but wsdl contains the attribute with any type 

<xsd:complexType name="Data">
<xsd:sequence>
<xsd:any processContents="lax" maxOccurs="unbounded" />
</xsd:sequence>

</xsd:complexType>

I have successfully register this SOAP webservice in k2. Also I have created the smart objects. But when I am trying to consume SOAP webservice from k2. 'Data' smart object requires XMLElement . how can I pass XML in k2 as I am gettting serialize error while passing XML in this Data element from k2 smart object tester.

Thanks and Regards,

Rahul Gupta