404 redirection fails with HTML in the form submission.

I am using my 404 error page to dynamically display content.  
 - (the 404 is an ASPX page that is looking up content in the database from the original URL.)

This part has been working fine for form submission, so long as I don't include any HTML content in the form submission.

IF I include html code in a form submission, I get a generic html 404 error page.  In this circumstance, it is ignoring my error redirection.

From my Web Config:
<system.web >
   
     <pages validateRequest="false"  />
    <customErrors mode="On" redirectMode="ResponseRewrite" >
     
<error statusCode="403" redirect="dynamic.aspx" />
      <error statusCode="404" redirect="dynamic.aspx" />
LVL 8
hpdvs2Asked:
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BurniePConnect With a Mentor Commented:
I am really trying to help you :)

I tried everything in your two thread combined.

One last thing.. do you have a ErrorPage directive defined in your @Page directives?  Maybe it is trying to open that page and it doesn't find it.
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hpdvs2Author Commented:
Please note:  The form content is sent to the fake none existant page, which works, unless I posted an <hr /> or some other html tag.  (fails with a generic 404 error)
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BurniePCommented:
That type of error is 500, I believe.

<error statusCode="500" redirect="dynamic.aspx" />
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hpdvs2Author Commented:
An interesting guess, but I'm positive it is the generic 404 error, not a 500 error.  here is the content I receive back.

Server Error in '/LbpSite2' Application.
The resource cannot be found.
Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.

Requested URL: /LbpSite2/Content Editor.aspx
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hpdvs2Author Commented:
Also, to clarify, I tried the 500 error at your suggestion, but it did not have any affect.  
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hpdvs2Author Commented:
WOW!!!  I don't understand it, but that was the cause... This was one weird error.  

apply the answer to the previous one, and I'll mark you down for it as well.  this has been huge pain.

Thanks.

I set the ErrorPage to point to itself and that worked.  
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BurniePCommented:
I am glad we found it! :)

I must admit I really spent time on this one, I really wanted to know the cause!

Good luck in your programming!
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