What exactly do you mean by "not working properly"?
This setup should work, if there are any issues please describe them.
(What file locations do you refer to? what are the issues you are experiencing?)
It may be possible that the registry files and/or the system files for 2013 is overriding the 2014 settings.
Normally when upgrading the latest version overwrites the values of the previous version.
Why would you want two seperate versions on the same pc anyway?
What if you saved something in 2014 and could not open it in 2013.