IIS PHP Error.

[DiverseLulz]

So the title states that I'm having a PHP Error with IIS.
Below is error that appears;

HTTP Error 500.0 - Internal Server Error
C:\Program Files (x86)\PHP\v5.3\php-cgi.exe - The FastCGI process exited unexpectedly
Detailed Error Information
Module    FastCgiModule
Notification    ExecuteRequestHandler
Handler    PHP53_via_FastCGI
Error Code    0x000000ff
Requested URL    http://178.18.246.101:80/index.php?url=staff
Physical Path    C:\inetpub\wwwroot\index.php
Logon Method    Anonymous
Logon User    Anonymous

Any ideas on how I could fix this problem?
Thanks in advanced.

 

[TheLuke]

Did you install PHP?

UPDATE:
I have came across this error before and resolved it, but I don't remember how.

 

[DiverseLulz]

Yes, PHP is installed.

 

[TheLuke]

I cannot remember how I did this, sorry.

 

[Gajeel]

So the title states that I'm having a PHP Error with IIS.
Below is error that appears;

HTTP Error 500.0 - Internal Server Error
C:\Program Files (x86)\PHP\v5.3\php-cgi.exe - The FastCGI process exited unexpectedly
Detailed Error Information
Module    FastCgiModule
Notification    ExecuteRequestHandler
Handler    PHP53_via_FastCGI
Error Code    0x000000ff
Requested URL    http://178.18.246.101:80/index.php?url=staff
Physical Path    C:\inetpub\wwwroot\index.php
Logon Method    Anonymous
Logon User    Anonymous

Any ideas on how I could fix this problem?
Thanks in advanced.

Do you have your web.config?