Error on request: System.Net.WebException: The remote server returned an error: (404) Not Found. at System.Net.HttpWebRequest.GetResponse() at Strukton.SharePoint.WebParts2.XmlRequest.Get(String requesturl, String username, String password, String proxyuri, String proxyusername, String proxypassword, ConfigFilters config, String fid, String fopleiding, String fregio, String fvakgebeid)