Unable to connect to APEX from remote machine.

Hi All,
I have installed APEX 4.2.2 on Oracle 10g XE , the installation was successful and I am able to see the apex home page.
I have used the port 1234 for the same.
http://127.0.0.1:1234/apex/f?p=4550:1:14917953436987
Now I have configured web listener apex_listener2.0.3 for remote machines and used port 8086.
The listener was started on standalone mode successfully, but when I am trying to access below URL :
http://localhost:8086/apex/
I am getting 503 - Service unavailable error.
I have disabled local listener also , but still it is not woking .
SQL> exec dbms_xdb.setListenerLocalAccess (l_access => FALSE) ;
commit;
Please help .

Getting below message in console whenever I am trying to access http://localhost:8086/apex/
SEVERE: The pool named: apex is not correctly configured, error: Connection Caching Not Enabled or Not a Valid Cache Enabled DataSource
oracle.dbtools.common.jdbc.ConnectionPoolException: The pool named: apex is not correctly configured, error: Connection Caching Not Enabled
Could you please help me on this.

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Dec 29 11:06:20 molika sshd[7248]: in pam_sm_authenticate(): Failed to determine Kerberos principal name.
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