Sepm 12.1.2 is not upgrading clients

Hello

Yesterday I upgraded SEPM 12.1 to 12.1.2. Now I can't get my clients to be upgraded. I Tried to manually upgrade client software throug remote instal from manager, but it was not successful. Setup gives no errors, I see re-installation process n client, but at the end client still stands on 12.1.671.4971 version. Moreover the client show his icon without small green dot. But connection status is good and client is shown in Manager. 

Only manual setup of packet on the client side is helpful. But it's not the way when u have about 100 computers in office

Help please.