Web Wiz CAPTCHA - Captcha sometimes failing

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Captcha sometimes failing

Printed From: Web Wiz Forums
Category: Web Wiz Web App Support Forums
Forum Name: Web Wiz CAPTCHA
Forum Description: Support forum for the Web Wiz CAPTCHA security image.
URL: https://forums.webwiz.net/forum_posts.asp?TID=23081
Printed Date: 28 March 2026 at 6:06am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com

Topic: Captcha sometimes failing

Posted By: CCollins
Subject: Captcha sometimes failing
Date Posted: 09 April 2007 at 4:33pm

First let me say how much I like this Captcha solution compared to others I've reviewed. I hope I do not have to find an alternative solution. Here's my problem:

I get users that reportedly cannot register on my site due to the Captcha always failing. If I stop and start my website (IIS 6 on W2K3 SBS), the issue is resolved. Any ideas for why this is happening?

Also, Firefox users are having difficulty registering due to failing the Captcha, however, they can then use IE to successfully pass the Captcha.

Any help would be greatly appreciated.

Replies:

Posted By: WebWiz-Bruce
Date Posted: 10 April 2007 at 7:29am

The CAPTCHA uses session variables to store the displayed result.

If cookies are not working on the users browser, or if your server is not working correctly and can not store session variables then it would course the problems you mention.

Having to stop and restart IIS to get it to work sounds like there is a problem on the server with ASP sessions, make sure that your server is fully patched and up to date, and you are not running some rouge code that is crashing session variable on your site.

If you are using Windows 2003 make sure you have at least SP1 installed as previous versions of Windows 2003 did have issues with ASP sessions.

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Posted By: CCollins
Date Posted: 10 April 2007 at 6:45pm

Awesome. Great product. Many thanks.

Posted By: CCollins
Date Posted: 22 April 2007 at 10:30pm

Looks like I had the sessions configured incorrectly. Here is a good article that helped me resolve it. Thanks for pointing me in the right direction.

http://www.asp101.com/resources/apps_sessions_gasa.asp - http://www.asp101.com/resources/apps_sessions_gasa.asp

Posted By: swangpong
Date Posted: 23 August 2007 at 2:12pm

The server is Windows 2003 SP2 with the latest patch available. IIS also uses Application pool with the number of workers set to 1. The max memory is set to be large enough. Please advise how we can config the IIS to support your application