Problem with changing sylink.xml file with sylinkdrop

After updating SEP to 12.1 RU1 MP1 we cannot move clients to other group by using sylinkdrop.exe. Clients can move only from the SEPM console. 
We change sylink.xml ​​according to the instructions described in the article:
http://www.symantec.com/business/support/index?pag...
Has anyone met this problem in version 12.1? In version 11.0.7 it worked without a problem.

Regards

Tom