Muchisimas gracias por tu ayuda

Hola
Estos son los dos tsnames que tengo
El tsnames de oraclexe
XE =
  (description =
    (address = (protocol = tcp)(host = totan-22ef8385a)(port = 1521))
    (connect_data =
      (server = dedicated)
      (service_name = XE)
    )
  )
EXTPROC_CONNECTION_DATA =
  ( =
    (address_list =
      (address = (protocol = ipc)(key = EXTPROC_FOR_XE))
    )
    (connect_data =
      (sid = PLSExtProc)
      (presentation = RO)
    )
  )
ORACLR_CONNECTION_DATA =
  (description =
    (address_list =
      (address = (protocol = ipc)(key = EXTPROC_FOR_XE))
    )
    (connect_data =
      (sid = CLRExtProc)
      (presentation = RO)
    )
  )
el tsnames de developer
EXTPROC_CONNECTION_DATA =
  (description =
    (address_list =
      (address = (protocol = tcp)(host = 192.168.0.10)(port = 1521))
    )
    (connect_data =
      (service_name = PLSExtProc)
    )
  )
Un saludo