topic Error CS0234 in IIS 8 in QlikView https://community.qlik.com/t5/QlikView/Error-CS0234-in-IIS-8/m-p/1010472#M1233176 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #1f497d;">Hi Experts, </SPAN></P><P></P><P><SPAN style="color: #1f497d;">The customer is running IIS 8 on a Windows Server 2012, QlikView 11 SR 12 .Net Framework 4.5, it works perfectly on windows authentication.</SPAN></P><P><SPAN style="color: #1f497d;">However, when I run the authenticate.aspx during custom authentication, it prompts an error that cannot import the System.DirectorytServices, the error code is CS0234, any idea?</SPAN></P><P></P><P> <IMG alt="error.png" class="jive-image image-1" src="https://community.qlik.com/legacyfs/online/102467_error.png" style="height: 140px; width: 620px;" /></P></BODY></HTML> Mon, 26 Jan 2026 16:26:21 GMT Anonymous 2026-01-26T16:26:21Z Error CS0234 in IIS 8 https://community.qlik.com/t5/QlikView/Error-CS0234-in-IIS-8/m-p/1010472#M1233176 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #1f497d;">Hi Experts, </SPAN></P><P></P><P><SPAN style="color: #1f497d;">The customer is running IIS 8 on a Windows Server 2012, QlikView 11 SR 12 .Net Framework 4.5, it works perfectly on windows authentication.</SPAN></P><P><SPAN style="color: #1f497d;">However, when I run the authenticate.aspx during custom authentication, it prompts an error that cannot import the System.DirectorytServices, the error code is CS0234, any idea?</SPAN></P><P></P><P> <IMG alt="error.png" class="jive-image image-1" src="https://community.qlik.com/legacyfs/online/102467_error.png" style="height: 140px; width: 620px;" /></P></BODY></HTML> Mon, 26 Jan 2026 16:26:21 GMT https://community.qlik.com/t5/QlikView/Error-CS0234-in-IIS-8/m-p/1010472#M1233176 Anonymous 2026-01-26T16:26:21Z