u/LingonberryLess8590

For background- When the puma was first added (along with the arieate), I got both of them y sheer luck but didn't use them since I was still in the russian tech tree 6. After some time, I also got the AGS and finally tried them, The AGS and arieate where both easy to use but when it came time for the puma, The missile system always said 'locking on target failed' and I was unable to use them, now don't get me wrong, the cannon is powerful with +100mm of pen but the ATGMS are the main thing to use against more armored targets. So can anyone help me with it?