Rails - Mar 2008 - Help using ARMailer

I get this error after trying to send an email:

can''t convert nil into String

I only have one model to send emails:

class MyMailer < ActionMailer::ARMailer

I have put this in config/development.rb:

config.action_mailer.delivery_method = :activerecord
require ''action_mailer/ar_mailer''

Where is the problem?
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I think the problem is located in ActionView/base, so thats what my log 
tells.

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I hope you''ve found a solution by now but I got the same error until I
double checked the model I was associating with ARMailer and found I
had it pointing to my personal email-forming class, not the blank
Email class ARMailer desired.  Once that was corrected, the error went
away and I''ve been firing emails with no problem.

On Mar 20, 2:43 pm, John Smith
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> I think the problem is located in ActionView/base, so thats what my log
> tells.
>
> --
> Posted viahttp://www.ruby-forum.com/.
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