It is up to you to download and install LR CC 2015 and PS CC 2015.1.
Install the Creative Cloud Desktop app. Make sure you are signed in with the correct Adobe ID, Email Address and Password, then in the Apps area you can download and install the most current versions.
If you're still running Lightroom 4 and Photoshop CS6 then you have not downloaded and installed the creative cloud applications. You cannot just subscribe and expect everything to be taken care of. It is still necessary for you to install the creative cloud application manager and let it keep track of your software and alert you when upgrades and updates are available. I have been using the creative cloud now for more than a year, and I have received notifications every time an update has been available.
What operating system are you using? If you're still running 32-bit XP or Vista then you won't be able to run current software.