Protx Protocol Error

I'm trying to implement the Protx payment gateway using GrantK's version of the contribution and am running into this error when testing against either the Protx VPS Simulator or their 'live' gateway:

Status:  MALFORMED

Status Detail: 3096 : The VPSProtocol value is required.

Line 100 of protx.php seems to have this appropriate entry:

$ouput  = '' . "\n";

Any ideas, folks?

TIA 

I have the solution!  The instructions for the contribution state:

3) In order to work around a Protx bug, you need to make the following change.

  Open this file in a text editor: catalog/template/default/content/checkout_confirm.tpl

  Change this line:

" method="post" enctype="multipart/form-data">

  to:

" method="post">

There are actually TWO lines that need amending ... a few lines down from the above line is this:

" method="post" enctype="multipart/form-data">

I needed to remove the enctype="multipart/form-data" from that also.

Rgds

Chris