Can't access Application level item

Hi,
I have set an Application level item. I have tried to assign it as a default value on a Page Item but nothing is being shown.
Application Level Item: APP_USER_ID
On New Instance computation:
select user_id
from isp_user
where login_id=:APP_USER
Page Item: P57_CREATED_BY
Default Value: &APP_USER_ID.
Default Type: Static Text with Session State Substitutions
No value is displayed, but if I replace &APP_USER_ID. with &APP_USER a value is displayed.
Thanks for any assistance.

OK, I've simplified the scenario to avoid any confusion. I'll give you a step by step of what I think you are telling me and see how we go. Believe I feel like I've tried everything...sure it's just my inexperience with the tool.
Via Shared Components/Items created....
Application Level Item: APP_USER_ID
On Page 57 of my Application I created a Before Header computation:
Item Name: APP_USER_ID
Type: SQL Query
Computation Point: Before Header
Computation: select 21 from dual
I assigned this to be the default value for a database field on Page 57, defined as follows:
Page Item: P57_CREATED_BY
Display As: Text Field
Source Used: Always,replacing any existing value in session state
Source Type: Database Column
Default Value: &APP_USER_ID.
Default Value Type: Static Text with Session State Substitutions
I logged out and logged back in. I checked Session State and saw that the APP_USER_ID Application Item exists but has not value.
I navigated to Page 57... no value is displayed in the P57_CREATED_BY field... If I review the Session State I can see that APP_USER_ID Application Item has a value of 21.
Changing &APP_USER_ID. to &APP_USER. displays a value which seems to indicate it is not an issue with the field definition.
Hope that is a little clearer.
Thanks, appreciate your help.
Jona

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Scott,
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You need to re-think the machinery here.
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<b>Question number two</b>
<input type="checkbox" name="f01" value="483" onclick="f_updateMember(77, 483)" id="77" />Answer
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[email protected]

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