Can't get new Digiland tablet to cast/mirror screen to Roku

I got the DL701Q Digiland recently but I can't get it to cast to my Roku. When I open the cast screen menu it displays that it has found the Roku on the wireless network but when I click it to connect it begins to connect and immediately loses the connection. I've been able to easily mirror my screen from other android devices but can't from the tablet. Thanks for any help you can provide!