How to solve loss of captcha images using Sitecore and Webforms For Marketers (WFFM)?

Question

I'm using Sitecore in combination with Webforms For Marketers (WFFM). I'm using the standard included captcha form field. When I press on F5 (page-refresh) the captcha refresh and audio button are not displayed. By the second F5 the captcha refresh and audio button are on screen again.

When I access direct the captcha refresh image the same problem occured by page refreshing (F5), but with a more detailed error message now.

The UTC time represented when the offset is applied must be between year 0 and 10,000.
Parameter name: offset

[ArgumentOutOfRangeException: The UTC time represented when the offset is applied must be between year 0 and 10,000.
Parameter name: offset]
   System.DateTimeOffset..ctor(DateTime dateTime) +13946944
   Sitecore.Resources.Media.Streaming.Preconditions.IfModifiedSincePrecondition.CheckRequestPreconditionAndSetResponseStatus(HttpContext context) +149
   Sitecore.Resources.Media.Streaming.RangeRetrievalResponse.ExecuteRequest(HttpContext context) +93
   Sitecore.Support.Resources.Media.MediaRequestHandler.DoProcessRequest(HttpContext context, MediaRequest request, Media media) +716
   Sitecore.Resources.Media.MediaRequestHandler.DoProcessRequest(HttpContext context) +477
   Sitecore.Resources.Media.MediaRequestHandler.ProcessRequest(HttpContext context) +67
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +913
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +165

URL = http://sitecore.local/~/media/Web Forms for Marketers/Icons/refresh.png

I have searched the internet for this specific problem, but I can't find a solution for this situation (Sitecore and WFFM). Does anyone have a solution?

Thanks a lot.

Jordy

UPDATE 27-02-2014 - I see that by a not working refresh or audio image, the web browser add this header to the request.

If-Modified-Since   Mon, 01 Jan 0001 00:00:00 GMT

So from what I understand, the captcha shows up on refresh and not on initial page load? — xoail
No, the captcha shows up on initial page load and not on refresh. — Jordy

Jordy Jordy · Accepted Answer · 2014-03-03T15:14:41

The solution is to create the images (captcha refresh and audio image) in the Sitecore Media library in all languages. That solves the problem.

How to solve loss of captcha images using Sitecore and Webforms For Marketers (WFFM)?

1 Answers