Not able to connect from client machine to server.

Hi Experts,

I have install the SAP B1 9.3 client on one XP m/c and trying to access the server.But am not able to connect it. When i go to 'Choose Company', it do not show me the database server name. i don't know what to do. i tried with installation of native client on client machine. I have MS SQL SERVER 2008 R2 on server.Please find the attached image file to clear your view about my question.