Management Plugin - Test fail with "No Route to Host"

Hi

I have installed the "Dell Management Plug-in for VMware vCenter" version 1.0.1.175 (just upgraded from 1.0.1.72) but are having trouble when registering my host in the Connection Profile using the vSphere Client.

Here's what I do:

In the vSphere Client go to Home->Management->Management Center->vserver.domain.com and create the "Connection Profile" entering my OMSA Credentials and iDRAC Credentials for 1 associated host. When I selec the "Test Connection" of my profile the "OMSA Agent" returns "Pass" but the iDRAC Protocol returns "Fail - No route to host".

Here is a snippet from the spectre_VCenter_app.log

Time[2012-01-17 14:33:03,116] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[192.168.155.11 Doing HTTP Connect(Addressing)...] 
Time[2012-01-17 14:33:03,118] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[Spectre: Skipping SSL Certificate checking for this connection.] 
Time[2012-01-17 14:33:03,131] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[192.168.155.11 Doing HTTP Connect Successful] 
Time[2012-01-17 14:33:03,293] TP-Processor3 DEBUG com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[HTTP response: OK] 
Time[2012-01-17 14:33:03,304] TP-Processor3 INFO com.dell.pg.spectre.business.profile.ConnectionProfileMgrImpl Message[System ID obtained for 192.168.155.11=565] 
Time[2012-01-17 14:33:03,311] TP-Processor3 DEBUG com.dell.pg.spectre.common.protocol.wsman.SpectreAuthenticator Message[Checking if cache needes Flushing] 
Time[2012-01-17 14:33:03,311] TP-Processor3 DEBUG com.dell.pg.spectre.common.protocol.wsman.SpectreAuthenticator Message[Putting Authenticator for URL: https://192.168.155.44:443/wsman] 
Time[2012-01-17 14:33:03,311] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[Certificate checking is disabled for this connection.] 
Time[2012-01-17 14:33:03,311] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.WSManBaseCommand Message[Firing command com.dell.pg.spectre.common.protocol.command.wsman.GetIdracId] 
Time[2012-01-17 14:33:03,481] TP-Processor3 INFO com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[192.168.155.44 Doing HTTP Connect(Management)...] 
Time[2012-01-17 14:33:06,482] TP-Processor3 DEBUG com.dell.pg.spectre.common.protocol.wsman.HttpConnection Message[Caught IO exception: No route to host] 
Time[2012-01-17 14:33:09,484] TP-Processor3 ERROR com.dell.pg.spectre.business.profile.ConnectionProfileMgrImpl Message[OutofBand Connection Test failed: com.dell.pg.spectre.commons.exception.RuntimeSpectreException: No route to host] 

192.168.155.11 is the ESXi 5.0 Host Management address
192.168.155.46 is the plugin appliance (host x.11)
192.168.155.44 is the iDRAC address (host x.11)

I really don't get it, the "No Route to host" error message seems like a very general description...
There should be no problem to connect to 192.168.155.44 whatsoever, no firewalls in this mix.

When connecting to the iDRAC (192.168.155.144) using a browser there is no problem, I can logon and 
all stuff is there. 

Anyone got a clue of how I should proceed with this problem (It was the same problem in the 1.0.1.72 release)?

Btw, I'm a real newbie to virtualization so It's not unlikely that I've made a general error when setting things up, but I

have followed all guide's very carefully...

/Thomas