You haven't stated what version of Lightroom you are using. You probably need to update or upgrade your software.
Using lightroom 5.7.1
Thank you for fast answer. I use lightroom 5.7.1
Lightroom 5.7.1 cannot read Sony's A7 II 14 bit uncompressed Raw files.
You need to either upgrade to Lightroom 6 for this or you can use Adobe DNG converter to convert raw files to DNG.