I just signed up for a new US account (used msia acc before this). then i login using this new US account and connected my iphone to itunes(on another computer, not the one im using all the time), and i don't know how to transfer my apps from iphone to itunes. i cannot use sync coz it will erase all my apps on iphone as my itunes apps is empty. i can't download any apps from itunes store using this computer and US account to sync with my iphone as well i will lose all my apps and only new app will be installed. anyone please helpppp?????

my iphone is jailbroken. i've tried transfer purchase but can't be done, it stops after 3 seconds i guess its failed.

btw, this problem is due to account or different pc?