Internet is disconnecting LEDSmart tv UN50ES6100


I bought new Samsung LED Smart TV UN50ES6100 and connected to wireless network but not able to watch videos, It is dsconneting every 60-90 second some vidoes is are running little long, The following message is showing

"your last browser session ended unexpectedly, Restore last session ? or go to Home Page ?"

after few seconds the Home page will appear automatically.

any idea why this is happening ?I have connected wireline also There is no issue with my internet connectivity.

The reason I bought Smart TV to connect internet but I am not able to watch videos through TV.

I appreciate your valulable suggestions,