Ah, you have a problem: the new OS. CS5 doesn't work with Yosemite. Furthermore, Adobe has no plans to make it work with Yosemite. To get your current work done, you'll have to revert to an older OS, sorry to say.
There's an old bit of wisdom you should know about -- never change your system in the middle of a project. No doubt you will live by it henceforth.
Thanks for the response.
I changed my OS system a long time ago. What's funny is that I have Adobe Master Suite and everything else works ok, except for the Adobe After Effects. Needless to say, ever since I upgraded to Mountain Lion and Yosemite, my Mac has never been the same. <Sigh>
Yeah, in my new job everybody lives in Windows-land. No more Macs for me. I understand this new OS isn't much to write home about.