Oracle Forms

I have configured webUtil and tested it on the demo and the demo worked just fine. But on my own program it isn't working. I did the OBJ file and the pll file and all that development time configurations. My program compiles with no errors. But when I run the program when I get to the webUtil part it doesn't do anything. The particular thing I am working on right now is just a simple browse button that will open up an open file dialog box and save the file path of the file the client picks into a text item. I took my code directly from the demo so I know there shouldn't be anything wrong with the code because I saw it work on the demo but when I try to use it on my program it doesn't do anything. Here is my code:

declare
l_filename varchar2(254);
begin
:global.user_home := webutil_clientinfo.get_system_property('user.home');
SYNCHRONIZE;
l_filename := client_get_file_name(directory_name => :global.user_home
,file_name => null
,file_filter => null
,message => null
,dialog_type => null
,select_file => null
);
:FILE_UPLOAD_BLOCK.file_upload_text := l_filename;
end;

any help would be greatly appreciated