PHP post method

[Anon]

I have a big questio regarding PHP post method.
This is from a good puzzle site
http://www.caesum.com/game/problems/misc_4.php
U must be logged on to answer that question

What is all about :
Well first u have to change the UserAgent string to "Crafted Agent".

U can change UA string in Mozilla simply (in security-prefs.js)
Add line
pref("general.useragent.override", "Crafted Agent");

U have to write a form to answer this question, i allready got answer from the server, but i don't know how to solve it, couse it's some kind encrypted, can any1 please help me to solve this problem.
(please mail me if u know how to solve this problem) [e-mail]

Any kind of info would be very helpfull.
Thx in advance

Here's the test answer :

Testing HTTP Request:
User Agent:

Expected: "Crafted Agent"

Found: "Crafted Agent"
Request Method:

Expected: POST

Found: POST
Answer:

Found: ... converting...
Failed.....

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