ruby-on-rails – 无法验证(检查)paypal帐户

用户sign_up时,我需要验证PayPal帐户.
我有功能(来源 – http://curry.byteally.com/finding-verification-status-of-a-paypal-account-ruby-on-rails-paypal-adaptive-accounts-getverifiedstatus/)
我输入了我的凭证并改变了.
我把它作为我的static_pages_controller(现在).

def verify_paypal
     ...
//change:
if res.status == 200
 @xml = XmlSimple.xml_in(res.content)
 #check if the status node exists in the xml
if @xml['accountType']!=nil
account_type = @xml['accountType'][0]
if account_type.to_s() == "Business"
    render :text => "Business account!"
elseif account_type.to_s() == "Premier"
    render :text => "Premier Account!"
elseif account_type.to_s() == "Personal"
    render :text => "Personal account!"
else
    render :text => "Account type not null but not a valid PayPal account type."
end
   end

在我的routes.rb中添加了一行

post "static_pages/verify_paypal"

在我看来：

<%= link_to "verify",static_pages_verify_paypal_path,:method => :post %>

但它不断给我文字：

"Gee! sorry! something went seriously wrong"

是什么意思,我的用户没有在PayPal中注册(但它是！).

EDTED
来自Heroku日志：

←[33m2012-07-15T17:22:56+00:00 app[web.1]:←[0m Started POST "/static_pages/verify_paypal" for 46.119.153.97 at 2012-07-15 17:22:56 +0000
←[33m2012-07-15T17:22:56+00:00 app[web.1]:←[0m Processing by StaticPagesController#verify_paypal as HTML
←[33m2012-07-15T17:22:56+00:00 app[web.1]:←[0m   Parameters: {"authenticity_token"=>"xnW29ekJqp7qBNrvIZJjPSh05AMdiHWNQMvLZhevCig="}
←[36m2012-07-15T17:22:57+00:00 heroku[router]:←[0m POST sharp-cloud-3895.herokuapp.com/static_pages/verify_paypal dyno=web.1 queue=0 wait=0ms service=1058ms status=200 bytes=42
←[33m2012-07-15T17:22:57+00:00 app[web.1]:←[0m   Rendered text template (0.0ms)
←[33m2012-07-15T17:22:57+00:00 app[web.1]:←[0m Completed 200 OK in 1046ms (Views: 6.7ms | ActiveRecord: 2.7ms)

这一行的第一个问题：

"emailAddress" => params[:paypal]

我可以把它改成吗？

current_user.email

第二个问题 – 问题出在哪里,我做错了什么？