Issue with Bssid & Reaver Dissconnecting!!

Step 1: Issue with Bssid & Reaver Dissconnecting!!

Hi folks,I cannot solve this issue so any help will be most appreciated.. I Have Kali 2.0 running on a VBox I Have Just Purchased the Alfa AWUS051NH v.2, The Issue I Have Is as I run Airodump no bssid are coming up, If I reboot the whole system it might work for 10 mins then all the bssids dissapear. The 2nd issue i have is when i run Reaver It Dissconnects from the system time and time again ...I am pulling my hair out here...