I can not help you about this problem but we can help me.
I am using JBoss-3.2.3 and IIS 6 with ISAPI redirector but don't work.
Please send me the steps and the axample files of the configuration.
Which version of the ISAPI redirector are you using ?
It seems that I can't help you but I've been trying to find how to integrate IIS 6 with Jboss. Do you have the steps of how to do this? I also couldn't find an isapi redirector for JBoss, although underneath the covers, the tomcat one should work. Where did you get the isapi_redirector file?
mod_jk2 has a known Upload problems. Can you try with the mod_jk1.2.x versions of the connectors?