1. Set the following profile options for the user who performs the Home Page personalization: Personalize Self Service Definition – Yes and FND: Personalization Region Link - Yes
2. Login to Applications Home Page and select the ‘Personalize Page’ link.
3. In the search option look for the “Row Layout” value in the list of values
   (style field) and click on GO button.
4. In the “Row Layout: Home Content Row” row, click on Personalize icon.
5. Change the rendered attribute to True in the “Applications Home Page” column.
6. Click on Apply, then Log off and Log in again. The worklist should appear this time.

When you try to install the Oracle Workflow Builder on Vista, the following error appears:

Starting Oracle Universal Installer…
Checking installer requirements…
Checking operating system version: must be 4.0, 5.0, 5.1 or 5.2.    Actual 6.0
Failed <<<<

Oracle Workflow Builder Client has not been Certified yet to run on Windows Vista.
To configure the compatibility mode for an application, just locate the installation directory and right click on the .exe, selecting Properties from the menu.

1. Navigate to the WF Builder installer (setup.exe) in the file system
2. Right-Click on the “setup.exe” > then go to Properties
3. Check Compatibility Mode and  Select “Windows XP (Service Pack 2)”
4. Now restart the Installer for the Workflow Builder

Reference:
http://www.howtogeek.com/howto/windows-vista/using-windows-vista-compatibility-mode/
Note 551484.1 – Unable To Install Workflow Builder On Microsoft Vista