Troubleshooting Io exception for application where other applications work

I'm using jdev9052 to create a struts/jsp application. I've successfully deployed it to a test machine similarly configured to my production environment. I already have another application working in the production environent that uses the following connection in data-sources.xml:
<data-source class="com.evermind.sql.DriverManagerDataSource" name="Orac
leDS" location="weblogic.jdbc.DataSource.PlateauCoreDS" xa-location="weblogic.jd
bc.DataSource.xa.PlateauDS" ejb-location="weblogic.jdbc.DataSource.PlateauDS" co
nnection-driver="oracle.jdbc.driver.OracleDriver" username="user" password="pwd" url="jdbc:oracle:thin:@localhost:1521:PTdev" inactivity-timeout="30"/>
My application connection looks like this on the production machine:
<data-source name="jdev-connection-PlatPTVPC" class="com.evermind.sql.DriverMa
nagerDataSource" location="jdbc/PlatPTVPCCoreDS" xa-location="jdbc/xa/PlatPTVPCX
ADS" ejb-location="jdbc/PlatPTVPCDS" pooled-location="jdbc/PlatPTVPCPooledDS" co
nnection-driver="oracle.jdbc.driver.OracleDriver" username="user" password=
"pwd" url="jdbc:oracle:thin:@localhost:1521:PTDev" inactivity-timeout="30"
/>
The connection works on the test machine with this:
<data-source name="jdev-connection-PlatPTVPC" class="com.evermind.sql.DriverMa
nagerDataSource" location="jdbc/PlatPTVPCCoreDS" xa-location="jdbc/xa/PlatPTVPCX
ADS" ejb-location="jdbc/PlatPTVPCDS" pooled-location="jdbc/PlatPTVPCPooledDS" co
nnection-driver="oracle.jdbc.driver.OracleDriver" username="userVPC" password=
"pwdVPC" url="jdbc:oracle:thin:@w2kserver:1521:PTVPC" inactivity-timeout="30"
/>
The production machine is running Solaris 10, OAS 9.0.2.7 and the development machine is running Win2000, OAS 9.0.2.7.
The listener is running and the database is working because I can connect using the other application. Yet, when I run my application, I get the dreaded "java.sql.SQLException: Io exception: The Network Adapter could not establish the connection"
I used jdev to create an .EAR file, deployed it using the enterprise manager on both machines.
Any suggestions?

Get Turbo Lister (a free page editing and listing tool from eBay).
http://pages.ebay.com/turbo_lister/
eBay uses some seriously flawed markup on their auction pages. In fact, they don't even ALLOW you to use good code. You're better off using their proprietary tools for this. IMO, DW is not the right tool for creating eBay pages.
When you're ready to build a serious web site, come back to Dreamweaver.
Nancy O.
Alt-Web Design & Publishing
Web | Graphics | Print | Media Specialists
http://alt-web.com/
http://twitter.com/altweb
http://alt-web.blogspot.com

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schematic.pdf ‏15 KB

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Get Turbo Lister (a free page editing and listing tool from eBay).
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> what was the guidance?
1. Research other software that does similar things (not just exactly the same) as you need. If you like something in their solutions, copy it :)
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Troubleshooting Io exception for application where other applications work

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