I branched this to a new thread.
I also seem to remember that support.ca.com login was not previously needed to access pcm.ca.com from the internet.
I am now getting a HTTP ERROR 504 (pcm.ca.com took too long to respond) from my mobile.
I will check this out internally.
In the meantime login via support.ca.com should provide access from the CA APM Product Home Page:
CA Application Performance Management
PRODUCT COMPATIBILITY MATRIX
or the older spreadsheet format guides : COMPATIBILITY INFORMATION