UTF-8 Server.UrlEncode problem in ASP Classic

I'm having a bit of bother URL encoding a string of UTF-8 encoded text to pass over HTTP. I am using Server.URlEncode in classic ASP (vbscript) to do the encoding on the "é" character.

It produces the following string,

%C3%83%C2%A9

The system I am talking to over HTTP is PHP however and it cannot decode this string. Using a PHP encoder at http://www.albionresearch.com/misc/urlencode.php the same character encoded using the PHP URL encoding method comes out as,

%E9

Does anyone know how I can successfully encode my UTF-8 encoded strings in my ASP so that the PHP system can successfully decode them?

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