I bought a Ktec USB charger from 7DayShop.com. While the charger works with my 5g iPod and my Sony Ericsson mobile phone, the 2g iPod Touch does not appear to recognise the charger. I've tried using the cable that came with my 5g iPod and the one that came with the Touch and neither work. The Touch charges fine using either cable when connected to a PC. Any ideas?