Is there a reason your not using the ZenPack? Its basically the defacto standard for running distributed collectors in Core. It handles alot of the gotchas, and makes the process a lot simplier.

I'd suggest undoing whatever manual changes you made to support distributed collectors, and use the zenpack. The document you have followed is not for Core 4

try:

cat ~/.ssh/id_rsa.pub | ssh root@remote_collector_name "cat - >> /home/zenoss/.ssh/authorized_keys && chown zenoss:zenoss /home/zenoss/.ssh/authorized_keys"

at the password prompt enter password from 'root' user.

I too have a problem in my remote collector (i am using zenoss 4.2 on centos 5). i have installed the distributed collector zenpack but then i dont get any graph for the devices monitored by my remote collector.I had referred docs/DOC-2496 . Can anyone explain in brief about installing distributed collector in zenoss 4.2. please help me out