I can access it on my program and via web browser
Are you using WebBrowser control on your form ? I don't quite understand your question, but I think It might be something wrong with the site. If you're not a PC administrator then Windows firewall might prevent to load this web page. Another thing I would do is to check If that specific site is trusted under Internet EXplorer>Internet Options>Security (again, If you're not administrator then GPO settings in Active Directory might prevent you something).