Delete from wwv_flow_file_objects$ where file name like 'p1_name'

Question

I am having an issue deleting an object in my apex application. I have uploaded an object into the application i can open the application but i cannot delete from that application. I can delete it when i login to the server and provide this command:
delete from wwv_flow_file_objects$ where filename like 'Whatever.pdf';
I am looking for the code to assign to a button and how do i get it to process.
process
the code i currently have is this: DELETE from APEX_APPLICATION_FILES WHERE name = :P4_NAME and it is not working. What am i missing.
process point = on submit
run process = once per session
when button is pressed pdf_remove
name: pdf_delete
button:
action when clicked
action - submit page
execute validation - no
database action - no database action "it does not show my process"

Answer 1

Christian
Thank you very much,
I switched to Apex Listener over Weblogic Server that was already working, just added a new managed server and deployed apex.war and i.war on it.
the server resources are very good now.