Cannot login to application designer for peoplesoft

Hello Guys,

Here is the scenario:

I have multiple oracle databases with the same name as PSPROD on different physical servers. The two tns entries are as follows:

PSPROD =

   (DESCRIPTION =

     (ADDRESS_LIST =

       (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.24.181)(PORT = 9988))

     )

     (CONNECT_DATA =

       (SERVICE_NAME = PSPROD)

     )

   )

PSPRODT =

   (DESCRIPTION =

     (ADDRESS_LIST =

       (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.15.161)(PORT = 9988))

     )

     (CONNECT_DATA =

       (SERVICE_NAME = PSPROD)

     )

   )

We are trying to connect to PSPRODT via application designer - it gives me error: Invalid user id and password

I remove the 1st entry from tnsnames.ora file and change the 2nd entry to following

PSPROD =

   (DESCRIPTION =

     (ADDRESS_LIST =

       (ADDRESS = (PROTOCOL = TCP)(HOST = 172.16.15.161)(PORT = 9988))