Forms + VB macro communication problem with Java application deployed in Oralce Weblogic 11g server

I have oracle 11g forms application which is generating report in microsoft word document using template and VB Macro code

Data are coming from java application in xml format which is deployed in Oracle weblogic 11g secure server.

Database is Oracle 11g for both java and forms application.

When i am generating report from Windows 7 machine, it is working fine.

But when i am trying to generate same report from Windows XP machine, it is taking more time to get data from server, but no hope, system gets hang up and one message is there
"Contacting server for information"

Is there anything i need to do with Appliaction Server or Operating System.