Controller class extension ignored

Hi,
in R12, I'm tryng to extend controller in page /oracle/apps/ap/payments/ps/webui/SelectedPsPG 120.9.
Controller : SelectedPsCO
Application Module: PsrAM
To extend oracle.apps.ap.payments.ps.webui.SelectedPsCO I created a new controller in a new package oracle.apps.ap.cust.payments.ps.webui.XxmySelectedPsCO.
I compiled and deployed it on server.
In personalization page I updated contoller class value from oracle.apps.ap.payments.ps.webui.SelectedPsCO to oracle.apps.ap.cust.payments.ps.webui.XxmySelectedPsCO.
I add in custom controller code, on click existing "save" button, a raise of an exception, just to try it.
I tested my extension but it means not catch the change of controller and ignore the custom raise exception.
I bounced all services.
Please help me.
Lou

Thanks RMH,
I activated diagnostic and put messages in controller class.
Unluckly it doesn't appear.
After click on svae button I didn't see neither my custom message "MYprocessFormRequest" nor the standard message "processFormRequest".
Instead I can see "processRequest" and some referement to my custom CO
[25]:PROCEDURE:[fnd.profiles.Profiles]:getProfileOptionValue: name=FND_DISABLE_OA_CUSTOMIZATIONS; levelID=10002; levelValue=200; levelValueApplID=0
[25]:PROCEDURE:[fnd.profiles.Profiles]:getProfileOptionValue: name=FND_DISABLE_OA_CUSTOMIZATIONS; levelID=10001; levelValue=0; levelValueApplID=0
-->*[26]:EVENT:[ap.xxcust.payments.ps.webui.XxinSelectedPsCO]:OAF LOG: Event : Call Process Request, in: oracle.apps.ap.xxcust.payments.ps.webui.XxinSelectedPsCO: Entering Process Request*
-->*[26]:PROCEDURE:[ap.xxcust.payments.ps.webui.XxinSelectedPsCO]:processRequest - begin*
-->*[26]:PROCEDURE:[ap.xxcust.payments.ps.webui.XxinSelectedPsCO]:processRequest - begin*[26]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryPsrSummary - begin
[29]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryPsrSummary - end
[29]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryCurrTotals - begin
[32]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryCurrTotals - end
[32]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:querySelectedPs - begin
[37]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:querySelectedPs - end
*-->[38]:PROCEDURE:[ap.xxcust.payments.ps.webui.XxinSelectedPsCO]:processRequest - end*
[39]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryPsrSummary - begin
[41]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryPsrSummary - end
[42]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryCurrTotals - begin
[44]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:queryCurrTotals - end
[44]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:querySelectedPs - begin
[49]:PROCEDURE:[ap.payments.psr.server.PsrAMImpl]:querySelectedPs - end
*-->[50]:PROCEDURE:[ap.xxcust.payments.ps.webui.XxinSelectedPsCO]:processRequest - end*
So my personalisation seems picked up but processFormRequest is not fired.
cheers
Lou

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