--- moodle-1.9.4/mod/data/filter.php	2007-01-04 18:02:47.000000000 -0800
+++ moodle-edited/mod/data/filter.php	2009-02-13 15:25:51.000000000 -0800
@@ -25,6 +25,9 @@
         if (empty($contentlist)) {
             // We look for text field contents only, and only if the field has
             // autolink enabled (param1).
+            // MSSQL doesn't let you use a text or ntext column in a WHERE clause, so we 
+			 // check if the dbtype is mssql or mssql_n, and cast df.param1 (which is an ntext type)
+			 // as nvarchar(255) and compare against that
             $sql = 'SELECT dc.id AS contentid, ' .
                    'dr.id AS recordid, ' .
                    'dc.content AS content, ' .
@@ -38,8 +41,13 @@
                             'AND df.id = dc.fieldid ' .
                             'AND d.id = dr.dataid ' .
                             'AND dr.id = dc.recordid ' .
-                            "AND df.type = 'text' " .
-                            'AND df.param1 = 1';
+                            "AND df.type = 'text' ";
+ 			if($CFG->dbtype == 'mssql' || $CFG->dbtype == 'mssql_n') {
+				$sql .= 'AND CAST(df.param1 AS nvarchar(255)) = \'1\'';
+			} else {
+				$sql .= 'AND df.param1 = 1';
+			}
+			// End Mod
 
             if (!$datacontents = get_records_sql($sql)) {
                 return $text;