Wcf unable to publish the meta data

Question

HI,
this is James im using the vs 2008 and xp +sp 3  ,and IIS 5.1 .
i was using  builting wcf example ,if i run the project it is going run successully, and
if i pubhlish and browsefrom iis then it's workinf fine ,but if given machinename and domain name insteaed of loaclhost that time was not working .
if i want to publisht the meta , i mean to use it in another machine
im getting the timeout errror.
what may be the problem !