Error posting new messages in Discussion Forum Portlet.

I've installed the Discussion Forum Portlet from the Integration Tools version 9.0.4.0. I'm trying to post a message but I'm getting the following error:
'Unable to perform the operation: Row was not found using request parameter: 000100000004313530350000003E000000F95C4B5E59.' I've deleted the posting and reposted but the same error keeps coming up.
Any ideas?
Thanks,
Denise

Contents of application.log:
11/26/03 9:36 AM Started
11/26/03 9:36 AM Started
11/26/03 9:36 AM forum: oracle.jsp.runtimev2.JspServlet: init
11/26/03 9:36 AM forum: 9.0.2.2 Started
11/26/03 9:36 AM forum: 9.0.2.2 Stopped
11/26/03 9:36 AM Started
11/26/03 9:40 AM Started
11/26/03 9:58 AM forum: oracle.jsp.runtimev2.JspServlet: init
11/26/03 9:58 AM forum: 9.0.2.2 Started
11/26/03 9:58 AM forum: oracle.webdb.provider.v2.adapter.SOAPServlet: init
11/26/03 9:59 AM forum: ServletLogger - Logging level: 4
11/26/03 9:59 AM forum: [id=(null), instance=(null)] CONFIGURATION: Invalid or null value for property - executionWarningTimeout = null - setting to default value of 20 seconds
11/26/03 10:08 AM forum: [id=1069859279192ApplicationServerThread-6, instance=31122_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: Default container renderer not specified
11/26/03 10:08 AM forum: [id=1069859279192ApplicationServerThread-6, instance=31122_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: defaulting container renderer to DefaultContainerRenderer
11/26/03 10:08 AM forum: [instance=(null), id=(null)] WARNING: Request has exceeded its warning timeout Time[elapsed=20069ms. Warning timeout=20000ms.] Request[id=1069859279192ApplicationServerThread-6 providerId=3933761 portletId=1 portletName=DiscussionForum_Portlet portletInstance=31122_DISCUSSIONFORUM_PORTLET_3933761 user=PORTAL] Thread[ name=ApplicationServerThread-9 priority=5 alive=true interrupted=false groupName=main]
11/26/03 10:45 AM forum: [id=1069861494237ApplicationServerThread-12, instance=31124_DISCUSSIONFORUM_PORTLET_3933761] WARNING: EditInfo: OID server Port not an integer:
12/8/03 4:47 PM forum: 9.0.2.2 Stopped
12/8/03 4:47 PM Stopped (Shutdown executed by jazn.com/admin from 127.0.0.1 (127.0.0.1))
12/8/03 4:52 PM Started
12/9/03 1:38 PM forum: oracle.jsp.runtimev2.JspServlet: init
12/9/03 1:38 PM forum: 9.0.2.2 Started
12/9/03 1:38 PM forum: oracle.webdb.provider.v2.adapter.SOAPServlet: init
12/9/03 1:38 PM forum: ServletLogger - Logging level: 4
12/9/03 1:38 PM forum: [id=(null), instance=(null)] CONFIGURATION: Invalid or null value for property - executionWarningTimeout = null - setting to default value of 20 seconds
12/9/03 1:38 PM forum: [id=1070995094324ApplicationServerThread-11, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: Default container renderer not specified
12/9/03 1:38 PM forum: [id=1070995094324ApplicationServerThread-11, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: defaulting container renderer to DefaultContainerRenderer
12/9/03 1:38 PM forum: [id=1070995119760ApplicationServerThread-11, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] WARNING: EditInfo: OID server Port not an integer:
12/9/03 1:39 PM forum: [id=1070995151896ApplicationServerThread-11, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] WARNING: EditInfo: OID server Port not an integer:
12/9/03 1:39 PM forum: [id=1070995161009ApplicationServerThread-8, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] WARNING: EditInfo: OID server Port not an integer:
12/11/03 2:19 PM Started
12/12/03 3:18 PM forum: oracle.jsp.runtimev2.JspServlet: init
12/12/03 3:18 PM forum: 9.0.2.2 Started
12/12/03 3:18 PM forum: oracle.webdb.provider.v2.adapter.SOAPServlet: init
12/12/03 3:18 PM forum: ServletLogger - Logging level: 4
12/12/03 3:18 PM forum: [id=(null), instance=(null)] CONFIGURATION: Invalid or null value for property - executionWarningTimeout = null - setting to default value of 20 seconds
12/12/03 3:18 PM forum: [id=1071260317481ApplicationServerThread-9, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: Default container renderer not specified
12/12/03 3:18 PM forum: [id=1071260317481ApplicationServerThread-9, instance=31123_DISCUSSIONFORUM_PORTLET_3933761] CONFIGURATION: defaulting container renderer to DefaultContainerRenderer

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