Can not extend the page under ICX /oracle/apps/icx/por/reqmgmt/webui/ReqDetailsPG 115.42

Dear All,I need to extend the page
/oracle/apps/icx/por/reqmgmt/webui/ReqDetailsPG 115.42

in normal case I always create
extended object under our custom package tree below;

xxyk.oracle.apps.icx.por.reqmgmt.webui

when I put a sample page under this package I get the error message below;

but when I put the page under the tree without "icx" like xxyk.oracle.apps.po.por.reqmgmt.webui
I get the page with success.

I feel that my jdeveloper doesnt like "ICX" ...

Best and kind regards
Kivanc



The error message
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: FND-INVALID APPLICATION. Tokens: APPL = icx;