title: Difference between 32bit <> 64bit and serial communication
body: <p>I'am using the Rs232 Class Library in a vb.net application to print text to a POS printer.
  in the last week some of our clients have upgraded their system to Windows 7 x64 bits versions and start to fail when they print text via COM to the printer.
  Can anyone help me regarding this? Is there anything special you have to do with a 64bit enviorment when using the Rs232 library or is it the application itself that needs modification?</p>