Error while getting image from MSSQL database

I am trying to display an image stored in my MSSQL database in my Rails
2 application. As a test example I have written a C# application that
displays the image on a form which works. So I know the image in my
database is correct.

However when I try to retrieve the image by the following code it gives
me an rails error:

def show_account_logo
  @account = Account.find(params[:id])
  send_data @account.account_logo, :type => 'image/png', :disposition =>
'inline'
end
The following error is returned:

NoMethodError (undefined method `unpack' for #<Array:0x15b8fc44>):
c:/ruby/lib/ruby/1.8/base64.rb:59:in `decode64'
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-sqlserver-adapter-1.0.0.9250/lib/active_record/connection_adapters/sqlserver_adapter.rb:134:in
`binary_to_string'
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/attribute_methods.rb:211:in
`account_logo'
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/attribute_methods.rb:240:in
`send'
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-2.1.2/lib/active_record/attribute_methods.rb:240:in
`method_missing'
/app/controllers/manage/user_controller.rb:526:in `show_account_logo'

The following link on the internet is supposed to have the solution,
however that page doens't exist any longer.
http://blog.mcmoyer.com/2007/9/18/using-ms-sqlserver-with-rails

Any help would be appreciated.

"activerecord-sqlserver-adapter-1.0.0.9250"

Wow this seems to be a very old version of the sqlserver adapter
Could you please try it with the current version 2.3.24 ?
See:
https://github.com/rails-sqlserver/activerecord-sqlserver-adapter/tree/2-3-stable

Hi Klaus,

almost ashamed to say it, but yes. You are right. Needed to update my
sql-server-adapter.

Thx alot!

Benjamin