Hi Meena0907,
A warm welcome to our community 
I'm sorry to hear that your recordings are cutting short on the V+ box. I'd like to help check this further for you. I have checked the box remotely and so far all looks fine.
I'd like to request some further details if that's ok? Look for the 
icon above as I will be sending you a private message to request further information from you.
Collette