getting Error message at cleint side the trial license has expired

Hi, 

tested the client below scenario. Production SEPM server version :12.1 RU1 MP1

TEST SEPM SERVER VERSION 12.1 RU2 and client version is 1.1 RU2

we have one test SEPM server, from test SEPM server we have exported the client package and replaced the sylink file (copied from the production server). For testing purpose we have installed the new SEP clients. But today the same Client package installed in different system,But after installing we are getting a message that the trial license has expired.

 can anyone face this issue,if not , what is the reason for this?