Rails - Jun 2006 - Problem getting encrypted submit buttons working with the paypal gem and rails 1.1.2

I''m running Rails 1.1.2, and using version 1.9.0 of the paypal gem.  
When I make unencrypted paypal forms, they work just fine, I get the  
IPN notification from the sandbox and everything is wonderful. When I  
try to encrypt the form though, all I get is the error message "We  
were unable to authorize the transaction. Please contact your  
merchant.", which is ... unhelpful.

I generated a key and public certificate with the following ssl  
commands:

openssl genrsa -out business_key.pem 1024
openssl req -new -key business_key.pem -x509 -days 3650 -out  
business_cert.pem

I load the keys with the following code in my controller
     @our_privatekey = File::read("#{RAILS_ROOT}/config/ 
business_key.pem")
     @our_pubcert =
File::read("#{RAILS_ROOT}/config/business_cert.pem")

and confirmed via logger.info that I''m loading the correct data from  
the files.

I use them in my form view like so:

<%= paypal_setup @invoice_id, Money.us_dollar(@pp_amount_owed),  
@paypal_to, :business_key => @our_privatekey, :business_cert =>  
@our_pubcert, :business_certid => @our_certid, :return =>  
@pp_return, :item_name => @pp_item_name, :notify_url => url_for 
(:only_path => false, :action => ''paypal_ipn'') %>

I set the certificate ID to the ID showing in my sandbox user''s  
Encrypted payment settings after uploading the key.

Any suggestions about what I''m doing wrong? Also, is there any way to  
get the paypal sandbox to give more useful debugging information?

jpb
-- 
Joe Block <jpb@ApesSeekingKnowledge.net>

Computer Science is about lofty design goals and algorithmic  
optimization. System Administration is about cleaning up the  
resulting mess.