Most likely you network has installed a URL filter which blocked pandora.com. One way to get around it is to use a public proxy relay server which isn't blocked by your URL filter. When you want to connect to pandora, you will connect to the proxy server it than relay your request to pandora.com.
One of the proxy relay server is GTunnel http://www.internetfreedom.org/GTunnel
I have not used it myself because I have no such need but friends of mine had. You might want to give it a try.
One of the proxy relay server is GTunnel http://www.internetfreedom.org/GTunnel
I have not used it myself because I have no such need but friends of mine had. You might want to give it a try.