hey Hi,

can u refer below the links and once again,can u explain your question briefly.

http://answers.microsoft.com/en-us/windows/forum/windows_7-networking/this-program-cannot-open-the-required-dialog-box/d3bf5394-182c-4464-9d38-5e13680f1138

please check the name resolution - make sure that you can resolve the server name from the client - and vice versa

I would also suggest you disabling the firewall completely .

Ensure that the account you are using on the server is a local one (rather than domain based).

Thanks,