Place login code in a web service and make it work

Hi,

I have this code, can I place it in a web service, deploy this webservice on tomcat and make it work?

       public Boolean BuscarDocumento(String name) throws Exception{

        try{

IDfClientX clientX = new DfClientX();

IDfClient localClient = clientX.getLocalClient();

IDfLoginInfo li = clientX.getLoginInfo();

li.setUser("userp");

li.setPassword("userp");

IDfSession session = localClient.newSession("LAEPSV", li);

IDfQuery query = clientX.getQuery();

query.setDQL("select * from dm_sysobject where object_name = '" + name + "'");

IDfCollection col = query.execute(session,DfQuery.DF_READ_QUERY);

            if (col.next()) {

            return true;

            }else{

            return false;

            }

        }catch(Exception ex){

            throw ex;

        }

I can access the web service, but when I try to consume this web service (which has been deployed in other machine) I always get the same error:

AxisFault

faultCode: { http://schemas.xmlsoap.org/soap/envelope/}Server

faultSubcode:

faultString: com/documentum/fc/client/DfAuthenticationException

faultActor:

faultNode:

faultDetail:

{ http://xml.apache.org/axis/}stackTrace:com/documentum/fc/client/DfAuthenticationException

at org.apache.axis.message.SOAPFaultBuilder.createFault(SOAPFaultBuilder.java:222)

This code works fine when I try it in composer on my local machine.