Procedure on item type

In the procedure tab of the Item Type, I have the following procedure added
add (http://xxxxx.com:7778/pls/portal/prj_test.rm_first_page? p_team_name=& p_proc_title=& )
with attribute: category pass as p_team_name and
display_name pass as p_proc_title
1) After I click the procedure, p_team_name gets null value. Do you know why and how to correct it?
2) How can I call the procedure automatically without clicking the link text?
Thank you

After I check "Display Procedure Results With Item", I get the following error message
Error 30584: DBMS_SQL has raised an unhandled exception. ORA-06550: line 1, column 128: PLS-00103: Encountered the symbol ";" when expecting one of the following: . ( ) , * % & = - + < / > at in is mod not rem <> or != or ~= >= <= <> and or like between || The symbol ")" was substituted for ";" to continue.
I only found the view wwsbr.all_items, not wwsbr.all_categories.
When I try to browse wwsbr.all_items, I get the following error message
[1]: (Error): ORA-06510: PL/SQL: unhandled user-defined exception ORA-06512: at "PORTAL.WWCTX_SSO", line 651 ORA-06510: PL/SQL: unhandled user-defined exception ORA-06512: at "PORTAL.WWCTX_SSO", line 497 ORA-06502: PL/SQL: numeric or value error ORA-06512: at "PORTAL.WWCTX_SSO", line 727 ORA-06512: at "PORTAL.WWCTX_API", line 173
Thank you

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Dear Lakshmipathi,
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Stuart,
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Hello,
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I found from the replies by Jerry(PM) about the example procedure for custom type in the url
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HI Jerry,
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Because the item is over priced, it means that my inventory gl is over stated. When I get the supplier's CN, I will have to reduce the inventory gl. When I create a Service Type A/P Credit Memo I must choose inventory gl. But this will create another problem - Inventory Audit Report balance will not tally with Inventory gl balance (because i didn't reduce the item price in the first place). To solve this is to do a Inventory Revaluation.
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Procedure on item type

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