Apache or htaccess url decode?

[Jabop]

Here is my problem:

 

I am passing the url below through a script for processing.

 

http://localhost/test.php%3Fid%3Dfileidgoeshere

 

When I go to the url with the urlencoding enabled, I get this error:

 

Forbidden

You don't have permission to access /test.php?id=fileidgoeshere on this server.

 

However, when I go directly to http://localhost/test.php?id=fileidgoeshere, I get the result that I want. Thing is, I need to have the original link to this script encoded, but my server is denying its view like that.

 

How would I enable the server to decode those encoded urls into their actual url?

I have been searching all night for the resolution to this problem, but with no luck. Any help would be greatly appreciated.