--- D:/wamp/www/www.mantis.local/admin/install-orig.php	Sat Jun 09 07:29:02 2012
+++ D:/wamp/www/www.mantis.local/admin/install.php	Thu Aug 09 21:49:40 2012
@@ -378,6 +378,10 @@
 			case 'pgsql':
 			case 'mssql':
 			case 'mssqlnative':
+				if( version_compare( $t_version_info['version'], '9.0.0', '<' ) ) {
+					$t_error = 'SQL Server 2005 or later is required for installation.';
+				}
+				break;
 			case 'db2':
 			default:
 				break;