DM Issue

I keep trying to update the OS on my 9700 but whenever i plug my bb into the computer and DM asks me to verify my phone is connected and i input the password in the computer and in the phone it stays on the screen that tells me that DM is trying to verify that my bb is connected to the computer

any Suggustions?

can anyone help??

more info
I do have DM installed on another computer and and i have used my 9700 on that computer once
but I cant get it to work on my own labtop which is running Windows 7