Calling Web Service With ABAP

Hi all,
I want to create a call to a Web Service of XI from another R/3 server.
I've created client proxy in system as said
/people/thomas.jung3/blog/2004/11/17/bsp-a-developers-journal-part-xiv--consuming-webservices-with-abap
But when I try I get the following error:
<i><CODE>INTERNAL.SYSTEM_NOT_CONFIGURED_AS_XMB</CODE>
<ERRORTEXT>System not configured as XI Integration Engine</ERRORTEXT></i>
I know I've left some configuration, I've to say to XI that R/3 server is going to use call to XI as application server, but how I do this conf?
If I try from XI I get:
<i>INTERNAL.PROXY_NOT_ALLOWED_ON_IS</i>
Is possible to call a web service from the XI server?
Thanks in advance.
Urtzi

HI,
Also see the below links
error:INTERNAL.SYSTEM_NOT_CONFIGURED_AS_XMB
DESTINATION_NOT_FOUND
HTTP destination IED_100 does not exist (system , transaction SM59)
CCM2.0 Config in NW2004s (PI7.0) u0096 XI Error
CCM2.0 Config in NW2004s (PI7.0) u0096 XI Error
Regards
Chilla

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