It seems to be related to a client authentication problem (ora-03136). The authentication process was not completed before the timeout occurred.
Here are a couple of links that may help you:
<a href=”http://www.dba-oracle.com/sf_ora_03136_inbound_connection_timed_out.htm”>Inbound connection timed out tips</a>
<a href=”http://download.oracle.com/docs/cd/B28359_01/network.111/b28316/troublestng.htm”>Troubleshooting Oracle Net Services</a>