I have a Samsung E250, and recently something happened to it (I'm not sure what) and now the phone will not correspond with my computer when i plug it in via usb. I have changed the settings, i have all the right software - i even changed the usb settings from modem to mass storage and it still won't work. I need to get the phone plugged in with mass storage, so that i can transfer songs onto it. The phone recognises the usb when i plug it in, but the computer doesn't recognise the phone. Also, i happen to know that when the phone is plugged in with mass storage the memory card should be inaccesible, and this is not so when i plug in my phone. Is there a problem with my computer or my phone? If so, how can i fix it? Please help.