Axis Performance Problem

[E.Narayanan]

Hi,
     I have an Axis Web service hosted on Jboss(Jetty). For performance
testing  I had made a java  client which creates threads and makes
webservice calls. The calls were using the proxies generated from wsdl2java.
    I found that when the client and the server were on the same machine(P4
win 2k server) then performance was
acceptable. When I moved the client to another machine then I found the
processing time to shoot up 4 times. Is there something to better this ?
Thanks,
Narayanan