thats odd....
Try ebay....
undervoltage or overvoltage may damage your system........
It does NOT matter if the amperage on the power supply is greater than that of the laptop, but the amperage CANNOT be LESS than that of the laptop......if you remember your elementary school scinece class...or even if your elementary school had one.....
Try a universal power supply where you can set the voltage...like this one...
http://cgi.ebay.com/UNIVERSAL-New-La...ayphotohosting