Description:
------------
When passing the "begin tran", "rollback tran" or "commit tran" methods the process dies on exectuing $this->query("begin tran"); 

If you port the platform back to 5.0.2 everything runs fine.



Reproduce code:
---------------
mssql_query('begin tran');
$result = mssql_query('insert into table_name (fname, lname) values ('joe', 'bob')');
if(!$result)
{
mssql_query('rollback tran');
}

mssql_query('commit tran');

Expected result:
----------------
To run the main query and rollback the transaction if the query failed .

Actual result:
--------------
Stops on the begin tran and processes nothing else.