Oracle conexion problem

[mutley]

Hi

I must to connect in database oracle ,different database are in same Server (same IP) , but with different SID(Data source) , see tnsname below


, I tried to connect using in VB

See my connectstring

Provider=MSDAORA.1;Password="mypass";User ID=user1;Data Source=islq;Persist Security Info=True

work fine , but when use

Provider=MSDAORA.1;Password="mypass";User ID=user1;Data Source=lbpiq;Persist Security Info=True

Not work

my tnsnames.ora

islq =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.176.13.25)(PORT = 1548))
    )
    (CONNECT_DATA =
      (SID = islq)
      (SERVER = DEDICATED)
    )
  )
islp.WORLD = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.176.13.31)(PORT = 1558)) 
    ) 
    (CONNECT_DATA = 
      (SID = islp) 
      (SERVER = DEDICATED) 
    ) 
  ) 

lbpiq.WORLD = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.176.13.25)(PORT = 1545)) 
    ) 
    (CONNECT_DATA = 
      (SID = lbpiq) 
      (SERVER = DEDICATED) 
    ) 
  ) 

lbpiq = 
  (DESCRIPTION = 
    (ADDRESS_LIST = 
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.176.13.25)(PORT = 1545)) 
    ) 
    (CONNECT_DATA = 
      (SID = lbpiq) 
      (SERVER = DEDICATED) 
    ) 
  ) 

Using external tools (PLSQL DEVELOPER, TOAD ...ETC ) work fine boths connections using same user and password ( user1 and mypass)


Is there some other way to connect , using IP and PORT ?

Tia