Participant control in an external activity

Hi,
I'm new to this community and to BPM. First to say I find really usefull all information here.
Here is my question: I'm trying to put a piece of code in the prepareActivity of an external activity, that controls the participant that is currently executing the activity. Each instance flows through 3 activities and stores the participant that executes it because I don't want to let the same participant execute more than one activity for the same instance.
It works fine for method-like-interactive activities but doesn't work if I put the code in the prepare method of an activity that calls an external resource.
Any ideas why?
Thanks in advance

Hi All,
I have a java webservice code deployed on Weblogic7.0 server. 
The above webservice code generated through servicegen Tool.
The Following lines related to client .wsdl file.
------------client-----------------------
<wsdl:port name="ServiceV2Soap" binding="tns:ServiceV2Soap">
<soap:address location="xxxxx"></soap:address>
</wsdl:port>

Instead of the above lines When I generated through servicegen Tool I got the following lines.
-------------my code------------------
<port name="ServiceV2Port" binding="tns:ServiceV2PortSoapBinding">
<soap:address location="xxxxxx"></soap:address>
</port>

Becase of the difference(<wsdl:port>,<port>) I am not able to call my deployed webservice.
Would very much appreciate any pointers.Thanks
Prakash.
Edited by prince.prakash18 at 03/12/2008 4:27 AM

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