Are you running Tomcat as root? That's fine, I just know that if you run under another user, and that user doesn't have a home directory, then there might be permission errors that required additional java parameters for specifying an alternative write path.

Do you see anything in tomcat's logs/catalina.out ?

Ohhhhhhhhhhhhhhh... good call. Whenever I try to submit the form, the below is written to the catalina.out log. Admittedly, I'm pretty new to Tomcat, so I'm still getting the hang of how everything works. I'll do some Googling and see if I can figure something out.

HTTPUtils-> Checking: http://64.151.226.25:8080/centric
1
2
3
HTTPUtils-> Checking: http://64.151.226.25:8080/centric
4
CustomHook-> Prepare send
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at com.darkhorseventures.framework.servlets.ControllerServlet.service(ControllerServlet.java:548)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:636)
Caused by: java.lang.NoClassDefFoundError: org/apache/xml/serializer/OutputPropertiesFactory
at org.apache.xalan.templates.OutputProperties.<init>(OutputProperties.java:82)
at org.apache.xalan.transformer.TransformerIdentityImpl.<init>(TransformerIdentityImpl.java:86)
at org.apache.xalan.processor.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:821)
at org.aspcfs.utils.XMLUtils.toString(XMLUtils.java:465)
at org.aspcfs.utils.XMLUtils.toString(XMLUtils.java:450)
at org.aspcfs.modules.setup.beans.RegistrationBean.toXmlString(RegistrationBean.java:397)
at com.darkhorseventures.framework.hooks.CustomHook.populateSendReg(CustomHook.java:546)
at org.aspcfs.modules.setup.actions.Setup.executeCommandSendReg(Setup.java:128)
... 20 more
Exception. MESSAGE = null
> No Action found, so doing nothing.

Oh... sorry. To answer your other question, yes, Tomcat is running as root.

Figured it out! I was missing xalan-2.6.0.jar from my $CATALINA_HOME/common/endorsed directory. After I downloaded a copy of that and stuck it in there, it worked just fine. Thanks so much for pointing me in the right direction!