connecting SQL SERVER 2005 from Oracle

HS_FDS_CONNECT_INFO="UDLFILE=C:\ccc\SQLSERVER.udl

(SID_DESC=
      (SID_NAME=DATAB)
      (ORACLE_HOME = C:oraclexeapporacleproduct10.2.0server)
      (PROGRAM=hsolesql)
   )

SQLSERVERDB =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = riereta)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME=DATAB)
    )
    (HS=OK)
  )