hi friends, i installed and configured isa 2000 on my network and configured it for firewalling and webcaching. i can access the internet but cannot use the msn messenger service. the msn messenger works well without the isa server. i have checked the configurations and nothing appears to be wrong. whats wrong? essiet akwa .o __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com