my $request=$ua->request(
  POST "https://www.saxobank.com/Default.aspx/?id=2&Lan=EN&Au=0&Grp=0",
  {
    __VIEWSTATE => 'dDwxOTk0Mzg2NjQzOzs+/+MSvllHQREYBFP5zZXrPV/rhdM=',
    txtUID      => 'me',
    txtPWD      => 'secret',
    submit      => 'log in'
  });