"Charging Not Supported With This Accessory"

I just purchased 2 Iphones 3Gs and I am also getting the same error with the Bose Iphone boom box it will play but not charge, Also My Pioner deck in my car the Ipod cord will play but not charge and ALL 4 car chargers 2 in my car and the 2 in my wifes car will NOT charge the 3GS but will charge Both My Iphones 2G, But not eather one of the Iphone 3Gs I have. It also will not charge with the Iphone charger my friend has.

The 3GS will not charge with any device that supplies 12V for charging, which is the obsolete Firewire charger on original iPods. After the first generation iPods Apple switched to USB charging, but maintained the Firewire port for backward compatibility. when the 3GS came out they dropped it, probably to make room in the case for additional hardware (supporting firewire required 2 power supplies in the phone). Hardware manufacturers were notified several years ago that support for Firewire charging would eventually be dropped. Some got the message, others didn't. Fortunately, there are adapters that will allow your 3GS to charge with these older technology devices. The adapters are available in the Apple stores and apple store online, as well as from many accessory manufacturers (Belkin, Kensington, etc).

I had the same issue and it was driving me crazy. I spent 30 minutes with an Apple tech support guy today. He had me uninstall all my Apple stuff and reinstall iTunes. The thought was that my computer needed the new USB driver instead of the older one.

After I got off the phone the problem came back.

I have since taken your guy's advice and plugged in my USB cable to the rear of my machine instead of the USB hub in the front of my case (Antec 900). 30 minutes have gone by and still no error message so this may have fixed it.

I am now receiving this message after updating to itunes 9 & iphone 3.1 update I am directly connected to my usb port in the back of computer. Running on a Dell studio xps with vista. I'm having no problems with my MB 13" Aluminum with the same sync cable. Vista is a real cruel joke....

Please can you tell me what i need to look for. Just spent ages browsing for something likely. I have a lovely Bose sound dock but can't use it properly with my new i-phone nor can i play it in the car with my belkin ice kit.
I tried typing adapters etc but all i can find are thing for travel abroad.

Was this ever resolved? My iphone is doing the same thing. It has been doing it for the last 2 weeks.

I just got unlucky having this problem without doing any changes to my IPHONE and my computer.

I came back from work and plug in the ORIGINAL iphone cable as usual and now it can't charge and transfer data via USB.

What went wrong ? Restarted PC lots of times