what error that you got..?

which OS that you install using BBSAK..?

have u uninstalled the previous OS in your computer..?

have u wipe your device [before wiping , you need to make backup first]

you download OS .706 from which service provider..?

SPRINT ..?

it is compatible with your 9650   ,

and have u delete the vendor.xml ?

have u restart your computer..?
if you already wipe your phone.. you should see error 507 on your phone..,
have u see that..?

owh, yes.. it is compatible..   ,

anyway... if you didn't get error means that, your phone isn't successfully wiped   ,