Multiple DDL's from .net

hi if i ma executing

TDStrSQL = "create volatile table tab1(somename varchar(100)) on
commit preserve rows;create volatile table tab2(somenames
varchar(100)) on commit preserve rows;insert into tab1 values ('a');
insert into tab2 values ('b'); select * from tab1 union select * from
tab2;"


this above string


TDODBCcn = New Odbc.OdbcConnection(TDODBCcnString)
TDODBCcn.Open()
TDODBCcmdSelect = New Odbc.OdbcCommand(TDStrSQL, TDODBCcn)


TDODBCdtr = TDODBCcmdSelect.ExecuteReader


i am getting error


ERROR [25000] [NCR][ODBC Teradata Driver][Teradata Database] Only an
ET or null statement is legal after a DDL Statement.


in any wayi want to do this please reply me how i can achieve this