I am having a problem setting up a Database Link to a Microsoft SQL server.  I have installed the FreeTDS ODBC driver and the unixODBC manager, and I can connect to the database using the following Perl script:

use DBI;

my $dbh = DBI->connect('DBI:ODBC:MSSQLServer','sa','sapassword') or die $DBI::errstr;

$dbh->do("use MyDB");

my $rows = $dbh->selectrow_array("SELECT COUNT(*) FROM tblMytable");

print "Mytable has $rows records\n" if ( defined $rows);

This script returns the correct row count from my MS SQL server.  However, I cannot get a DSN defined in WebGUI that will connect.  Any advice, instruction, etc. would be greatly appreciated.  I am running the WRE with WebGUI 7.7.31 on Debian 5.03.