The A7R was first supported in Lightroom 5.3.
The A7RII was first supported in Lightroom 6.1.1.
Please confirm which version of Lightroom you are running and exactly which camera model you've purchased.
ah okay still have the old lightroom 4.4 .
okay need to buy lightroom 6
Alternatively, you could download the latest DNG converter (it's free) and use that to convert your raw files to DNG and then import the DNGs. It has the advantage of being free, but adds a step or two to your workflow.
On the other hand, there are probably features in LR 6.3 that you would find useful.