Where did you find that link? It is not even from a Symantec site so I doubt it is correct. But according to Pcanywhere’s 12.5 documentation this is how you download the Packager:
Find your PcAnywhere 12.5 install CD
Run Setup.exe or let it autostart
There is a button to VIEW OTHER INSTALLATION OPTIONS – Click this
Find the link to DOWNLOAD SYMANTEC PACKAGER
Start your download save the executale and run it
You are now installing Symantec’s Packager
In the future be aware of the links you are clicking on!