Application deployment: Users do not get prompt though specified in 'Deployment'

Hi All, I created a test application in SCCM 2012 R2, that basically contains a simple VBS which gives a prompt to the user. There is nothing else this script does - Just a simple prompt.

While creating it, I followed this link:
ConfigMgr 2012 / SCCM 2012 SP1 Step by Step Guide Part 19: Software Distribution - EXE

Now, while creating this application, I came to the page to specify the 'clause'. To my understanding, here you have say whether a File or a Folder exists to detect the already present application, so when this File or Folder is present, nothing happens and Software Center does not show anything. [please correct me if I am wrong here].

So I said if the file C:\Windows\abcd.exe is present at this point.

After this, during deployment, in user experience I selected 'Display all notifications and prompts'.

I deployed this to my own system and NOTHING came up even after Machine policy refresh (The collection is device based).

Please help here so the user gets a prompt that new software are ready to be installed, so they may click on it and run manually.

Thanks.