Problem:
User Web Site Extension "PHP" setting not being saved. When user tries to select PHP settings to 5.x, and clicks updates. The setting returns to 'None' after going back into the web site.
Environment:
1. DNP 2.6.0.
2. Windows Server 2003 Standard R2 SP2
x86 single server.DNP Portal, DNP Enterprise Server and DNP Server 2.6 all installed here.
3. SmarterMail 5.x, MS DNS, PHP 5.2, ActivePerl 5.10.0, .NET 1.1, .NET 2.0, .NET 3.0, .NET 3.5, MS SQL 2005 Express, IIS 6.0
4. No errors in Audit Log found
5. No errors found in Event Viewer.
Please note, reports without mandatory information will be ignored by DNP staff.
Optional information:
6. This issue is constant.Create a website using the joomla or wordpress (php applications). Those sites will still run. I checked in IIS Settings - Applications Configuration - Application Extensions, it has .php mapped to a correct path to php-cgi.exe on Verbs: GET,HEAD,POST.
7. Screenshots Attached.

8. Changes done before error appear. Reinstalled PHP as IIS CGI PHP. Was PHP-ISAPI previously. Changed because it did not work with applications before hand.
Thanks.