Citrix IIS ISAPI error loading web interface

ISAPI Filter ‘C:\citrix\isapi_redirect.dll’ could not be loaded due to a configuration problem. The current configuration only supports loading images built for a x86 processor architecture. I am running Windows 2003 64bit with a Citrix Presentation Server 4.5 x64. You NEED to install web interface first, before you install the licensing manager and rest of the components like the documentation says. The following was taken from the Citrix readme found here: http://support.citrix.com/article/CTX112222
“On a 64-bit version of Windows, the Citrix Web Interface installation will enable 32-bit Web extension support in IIS and this will disable 64-bit extension support. The following procedures resolve this issue. Due to this requirement, if you are installing the Web Interface on a 64-bit version of the Windows operating system, ensure that you install Web Interface prior to installing any other Citrix software, including Citrix Presentation Server and Citrix License Management Console. This particular order of installation allows the products to adapt to the 32-bit support in IIS. If you install these products in an incorrect order, the Web server may produce errors messages when it is accessed, such as Service unavailable.”

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