Impersonation between different workgroups is failing

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Please, first review this same subject at May 31st 200

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******In the COM+ Server******

My COM+ Application, in his Security Tag are following parmeters

Autorization
[checked] Enforce access checks for this applicatio

Security Level
(2nd Option

Authentication Leves for Calls
Packe

Impersonation Level
Impersonat

********In my IIS Server:********
machine.config

<processMode
enable="true
timeout="Infinite
idleTimeout="Infinite
shutdownTimeout="0:00:05
requestLimit="Infinite
requestQueueLimit="5000
restartQueueLimit="10" memoryLimit="60
webGarden="false
cpuMask="0xffffffff
userName="registry:HKEY_...,userName
password="registry:HKEY_...,password
logLevel="Errors"
clientConnectedCheck="0:00:05"

comAuthenticationLevel="Pkt"
comImpersonationLevel="Impersonate"

responseDeadlockInterval="00:03:00"
maxWorkerThreads="20"
maxIoThreads="20
/>