Error in Cache Notification .."CPASchemaException"

Hello gurus,
Our XI tech consultant is facing an error in Cache Notifications. He thinks its a installation/configuration problem from the basis side. Now i am new to XI, don't really know where to start.
Here's the background :
1. He is configuring a File 2 File scenario as a demo in XI.
2. Believe he has configured sender and receiver communication channels.
3. File Adapter - Input/output File Type XML/binary
He is getting error in Cache Notifications : Sender Agreement
(com.sap.aii.af.service.cpa.impl.exception.CPASchemaException: No SchemaDefinitions available for AdapterType: File|3b787a8035c111d6bbe0efe50a1145a5|http://sap.com/xi/XI/System
 at com.sap.aii.af.service.cpa.impl.schema.SchemaManager.getSchemaDefinition(SchemaManager.java:164)
 at com.sap.aii.af.service.cpa.impl.schema.SchemaManagedCPAObject.<init>(SchemaManagedCPAObject.java:82)
 at com.sap.aii.af.service.cpa.impl.schema.SchemaManagedCPAObject.<init>(SchemaManagedCPAObject.java:106)
 at com.sap.aii.af.service.cpa.impl.cache.CacheManager.parseXMLAttributes(CacheManager.java:730)
 at com.sap.aii.af.service.cpa.impl.cache.directory.DirectoryDataSAXHandler.endElement(DirectoryDataSAXHandler.java:570)
 at com.sap.engine.lib.xml.parser.handlers.SAXDocHandler.endElement(SAXDocHandler.java:154)
 at com.sap.engine.lib.xml.parser.XMLParser.scanEndTag(XMLParser.java:1847)
 at com.sap.engine.lib.xml.parser.XMLParser.scanElement(XMLParser.java:1743)
 at com.sap.engine.lib.xml.parser.XMLParser.scanContent(XMLParser.java:2323)
 at com.sap.engine.lib.xml.parser.XMLParser.scanElement(XMLParser.java:1740)
 at com.sap.engine.lib.xml.parser.XMLParser.scanDocument(XMLParser.java:2726)
 at com.sap.engine.lib.xml.parser.XMLParser.parse0(XMLParser.java:162)
 at com.sap.engine.lib.xml.parser.AbstractXMLParser.parseAndCatchException(AbstractXMLParser.java:132)
 at com.sap.engine.lib.xml.parser.AbstractXMLParser.parse(AbstractXMLParser.java:142)
 at com.sap.engine.lib.xml.parser.AbstractXMLParser.parse(AbstractXMLParser.java:245)
 at com.sap.engine.lib.xml.parser.Parser.parseWithoutSchemaValidationProcessing(Parser.java:276)
 at com.sap.engine.lib.xml.parser.Parser.parse(Parser.java:338)
 at com.sap.engine.lib.xml.parser.SAXParser.parse(SAXParser.java:125)
 at javax.xml.parsers.SAXParser.parse(SAXParser.java:345)
 at javax.xml.parsers.SAXParser.parse(SAXParser.java:143)
 at com.sap.aii.af.service.cpa.impl.cache.directory.DirectoryDataParser.updateCentralCache(DirectoryDataParser.java:54)
 at com.sap.aii.af.service.cpa.impl.cache.CacheManager.updateCacheWithDirectoryData(CacheManager.java:713)
 at com.sap.aii.af.service.cpa.impl.cache.CacheManager.performCacheUpdate(CacheManager.java:595)
 at com.sap.aii.af.service.cpa.impl.cache.CacheManager$CacheUpdateRunnable.run(CacheManager.java:440)
 at com.sap.engine.frame.core.thread.Task.run(Task.java:64)
 at com.sap.engine.core.thread.impl5.SingleThread.execute(SingleThread.java:74)
 at com.sap.engine.core.thread.impl5.SingleThread.run(SingleThread.java:141)
=========================================================
Also When we try to display end-to-end monitoring, we get a pop-up for authentication, we enter XIRWBUSER and password and it fails with authentication error. I have checked XIRWBUSER's authorization and also double checked the password.
Thanks for you help guys...
regards
nainesh
Message was edited by: Nainesh Nagarkar

I am getting this error in dev_jrfc.trc
Error file opened at 20060426 145122 Eastern Daylight Time Rel 6.40.14 (2005-08-08) [640.89]
Error> occured >Wed Apr 26 14:51:22,854<
RfcException:
 message: Connect to message server host failed
Connect_PM TYPE=B MSHOST=testsapds04 GROUP=PUBLIC R3NAME=XET MSSERV=sapmsXET PCS=1
ERROR Group PUBLIC not found
TIME Wed Apr 26 14:51:22 2006
RELEASE 640
COMPONENT LG
VERSION 5
RC -6
MODULE lgxx.c
LINE 3498
DETAIL LgIGroup
COUNTER 1
 Return code: RFC_FAILURE(1)
 error group: 102
 key: RFC_ERROR_COMMUNICATION
Error> occured >Wed Apr 26 14:59:01,505< >RfcGetException rc (7) message: This system rejects all logons using SSO tickets
<RfcGetException
Error> occured >Wed Apr 26 15:08:57,496<
RfcException:
 message: Connect to message server host failed
Connect_PM TYPE=B MSHOST=testsapds04 GROUP=PUBLIC R3NAME=XET MSSERV=sapmsXET PCS=1
LOCATION CPIC (TCP/IP) on local host with Unicode
ERROR Group PUBLIC not found
TIME Wed Apr 26 15:08:57 2006
RELEASE 640
COMPONENT LG
VERSION 5
RC -6
MODULE lgxx.c
LINE 3498
DETAIL LgIGroup
COUNTER 1
 Return code: RFC_FAILURE(1)
 error group: 102
 key: RFC_ERROR_COMMUNICATION
=====================================================
I have checked all the rfc's in sm59 and they all test successfully, Also checked if they were registered on the gateway, they were.
Looks like JCO is not able to connect to ABAP. Message server settings look fine, checked services file (port=3600).
Any ideas folks ??
thanks
Nainesh
Message was edited by: Nainesh Nagarkar

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Subject: Re : ORA-04061: existing state of has been invalidated ORA-04061:
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Error in Cache Notification .."CPASchemaException"

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