Cant Access to IIS asmx file externally

I have created a Web Service with .asmx file . I can access to the file on the server using localhost:8080/name.asmx but the thing is that its not accessible externally. I mean when I try to access from my other computer on the same network I get this error .

This page contains the following errors:

error on line 1 at column 2: StartTag: invalid element name Below is a rendering of the page up to the first error.

Any Ideas? Thanks