Tim, thanks for your help!.

I followed your suggestions and I got the following error:

'Connecting...ORA-12545:Connect failed because target host or object does not exist
The test did not succeed.
Some of the information you provided may be incorrect.
Press Back to review the information provided for net service name, or Change Login to change username.'

Here is the information that I provided in the Net8 Configuration Assitant:

1)Choose the configuration you would like to do.
I selected Local Net Service Name Configuration

2)Select what you want to do.
Add

3)What version of Oracle.
Oracle 8i

4)Service Name
oracle.animatedlearning.com

5) Select the protocol used for the database you want to access.
TCP

6.1) Enter the host name for the computer where the database is located.
webdev ( Webdev is the NT box where I installed ORACLE 60 days trial version )

6.2) A TCP/IP port number is also required.In most cases the standard port number should be used.

Use the standard port number of 1521.

7) Perform a test.
yes

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Here is the tnsnames.ora file located on my Webdev Server:

# E:\ORACLE\ORA81\NETWORK\ADMIN\TNSNAMES.ORA Configuration File:e:\Oracle\Ora81\NETWORK\ADMIN\tnsnames.ora
# Generated by Oracle Net8 Assistant

EXTPROC_CONNECTION_DATA.BANKUNITED.COM =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

ORACLE.BANKUNITED.COM =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = webdev)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = oracle.animatedlearning.com)
    )
  )

You wrote:
>In your case you probably would use Local net Service Name.
Why should I use Local net Service Name?.

Tim, I will keep looking at documentation to try to find out what went wrong.
If you have suggestions, there are more than welcome!!.

Once again, thanks for the guidance.

Sergio