Here's the source: 
sub SetBitMode
  {
  my $self = shift;
  my $mask = shift;
  my $mode = shift;
  
  unless( defined( $self->{_PFT_SetBitMode} ) )
    {
    return( undef ) unless( _importDll( $self, "PFT_SetBitMode" ) );
    }

  $self->{_PFT_STATUS} = $self->{_PFT_SetBitMode}->Call( $self->{_PFT_
+HANDLE}, 
                                $mask, $mode );
  return( 0 ) if( $self->{_PFT_STATUS} );
  return( 1 );

  } # SetBitMode()

[download]
It wants a mode and a mask, and if you're passing in the ID, it's interpreting that as the mask. Unless you've got an older version or something, passing in the ID may supress some error, but it's not likely doing the right thing.

In reply to Re^3: Problem Writing to FTDI COM Port using Win32::FTDI::FTD2XX by kschwab
in thread Problem Writing to FTDI COM Port using Win32::FTDI::FTD2XX by PrfrrdUsrNm

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