cfinvoke error

Hello,

I have a problem with cfinvoke tag, this is the code:

<cfinvoke webservice=" http://sandbox.backupassist.com/members/services/soapserver.php?WSDL" 
           method="dos" 
           returnvariable="res" 
           timeout="60">  

     <cfinvokeargument name="data" value="#xml#"/>
</cfinvoke>

the error is "Parsing error: Fatal Error: URI=null Line=76: Open quote is expected for attribute "class" associated with an element type "div".
It is recommended that you use a web browser to retrieve and examine the requested WSDL document to ensure it is correct. "

The destination webserver is not mine, but belongs to another society and do not contains error.

Thank you very much,

Alessia