c# - ASHX renders as broken image -

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i've got vexxing problem ashx handler renders captcha image. thing makes vexxing working fine 2 months ago , when went again today had stopped working.

what i've got page throws in captcha every often. markup example of challenge:

<img class="challengedtl" src="challenge.ashx?tkn=0057ea27-4d35-4850-9c6f-7a6fdc9818e2"/>

the guid references record in sql table contains actual content of captcha status of captcha challenge, i.e. has been processed , if did user right etc.

on page markup found, image displays broken jpeg. when drop breakpoint in ashx processrequest() method can see ashx never being called.

when take url out of source attribute , run directly address bar in browser, hit break point in processrequest , captch image rendered fine.

i don't believe ashx code problem, since works when call directly. problem seems why ashx isn't being called main page. given working in february @ loss explain going on.

i know has happened machine since then. suspect windows update or service pack something. reason captcha processing includes tracking ip address of caller. when working local host being registered 127.0.0.1 (ipv4) being registered ::1 (ipv6). red herring.

does know might causing or have suggestions how troubleshoot problem?

is handler in same folder page containing html posted above?


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