Hi 182,
You should check out this article: http://digital.ni.com/public.nsf/allkb/6F58D8300ACB743C862579F8006E2800
If you scroll down to the troubleshooting section you'll see different steps you can take to try and resolve your error. You should try changing the URL to use your computer IP address rather than the port number. If these steps don't work out for you, could you post more information about the error you're getting?
Thanks,
Myriam
Applications Engineer
National Instruments