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mrMister - 5:56 am on Sep 12, 2005 (gmt 0)
Logging IP addresses might be one way. You also need to get the referrer data sent to the page another way. Possible using a hidden field in the posted form or by using the querystring.
It's a security mechanism by the looks of it (hard to tell from just that section of the code). You need to find another way of ensuring that someone isn't posting data from a source other than your web site.