hi, i want to test drive the easytether app, but it just gives me a yellow triangle, i wonder why? i'm using samsung galaxy i9003. By the way, if i use the stock usb tether, it works just fine, but one problem though, the wifi keeps shut itself down after ten or more mins, the odd thing is if i wake up the phone screen by pressing the home key(since after several mins the phone's screen already shut off), i can see the wifi icon appear again and the connection resume. 