Help Connecting Wireless keyboard and mouse dongle using OTG cable with Android device

[marova]

Hi guys,
I've used the Genius wireless keyboard and mouse combo KB8000 using the OTG Cable. It worked fine. But the OS is kitkat 4.4.4
Now I've upgraded the OS to lollipop 5.0.2. I've purchased the wireless Logitech keyboard and mouse combo [MK330].
I'm unable to connect my new wireless Logitech keyboard and mouse combo [MK330] with my Google Nexus 7 2013 [LTE] 32 GB.
Anybody having any idea to fix this problem?