Shell replacement (-s) does not work with WinXP SP3

Hi,

i tried to run "rdesktop -s notepad" (replacing the windows shell) 
to my windows XP (SP3), but I get always the normal desktop and not the
notepad.

I think, it's a problem of the current version (SP3..) of my WinXP.
I tried the "rdesktop -s" to a w2k3-server, and it works fine ..

Also playing around with the PreXPSP2ShellProtocolBehavior key inside
the registry (e.g. 
	
http://www.insidetheregistry.com/regdatabase/viewvalue.asp?valueid=2253
	
http://www.winfaq.de/faq_html/Content/tip1500/onlinefaq.php?h=tip1910.ht
m)
) do not help me to fix this problem - I cannot start a different shell
..

No - I stucked .. could somebody confirm this problem ? Or even better -
can
tell me a solution ?

best regards
Danny

P.S.: Using current rdesktop 1.6.0.


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