CORBA error when using a cluster

We get the following errorwhenever we turn on the 2nd node of the Adobe LC cluster:

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>com.adobe.idp.DocumentError: org.omg.CORBA.OBJECT_NOT_EXIST: vmcid: OMG minor code: 1 completed: No
at com.adobe.idp.DocumentRemoteInputStream.pullContent(DocumentRemoteInputStream.java:105)
at com.adobe.idp.DocumentRemoteInputStream.read(DocumentRemoteInputStream.java:61)
at java.io.InputStream.read(InputStream.java:85)
at
....
....
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Some background info:

- Client application is deployed on a Weblogic 10.3 cluster. Application uses LC Java API's within stateless EJB to communicate with LC. See this post for more detail on architecture of client appl: http://www.adobeforums.com/webx/.59b88141

- Adobe LC v8.0.1 server is deployed on a different WebLogic 9.2 cluster. The application in #1 above invokes OutputClient.transformPDF(). Then, on the resulting Document, we invoke Document.copyToFile(). Here's when we get the CORBA error. If we shutdown one node in this cluster, the problem goes away! It's like LC cannot reference the Doument stream all of a sudden..??

Any help would be great!