Migrating web service from ColdFusion 8 to 10 issues

Migrating web service from ColdFusion 8 to 10 issues

I have a web service that has been running on CF 8 for awhile now without
issues. We've recently moved to CF10, and this web service no longer
works. I've already tried switching the Axis setting to 1, it's still
tossing errors. Has anyone else encountered this, or have an ideas on what
else to look for here?
Process:
CF Server sends a web service request to App Server.
App Server processes request, generates another web service back to CF
Server with SOAP data pushes, then replies back to the step 1 originating
request with a boolean response on how its own web service request went.
CF Server Errors:
The web service operation caused an invocation exception.The root cause
was that: ClientAbortException: java.net.SocketException: Connection reset
by peer: socket write error.
Cannot perform web service invocation [Method Name]. The fault returned
when invoking the web service operation is:
java.lang.NoClassDefFoundError: org/apache/james/mime4j/MimeException
App Server Error Logs:
com.sun.xml.internal.messaging.saaj.SOAPExceptionImpl: Message send failed
SEVERE: SAAJ0009: Message send failed
com.sun.xml.internal.messaging.saaj.SOAPExceptionImpl:
com.sun.xml.internal.messaging.saaj.SOAPExceptionImpl: Message send failed
Caused by: java.io.IOException: Error writing to server
I've gone as far as modifying the App Server configuration to have it's
web service request push out to the CF 8 server for processing, while
still replying back to the originating request from the CF 10 server. This
worked fine. It's definitely something with the requests or my CF 10 web
service config.
I can't post any of the code examples unfortunately.