1. Create a DOS bootable disk (floppy or USB key)
2. Download the IPMItool from this link: http://www.intel.com/design/servers/ipmi/ipmi_tool.htm
3. Copy the IPMItool.exe to the bootable disk
4. Boot the server using the bootable disk
5. Run "ipmitool.exe 20 18 47 03 02 61 64 6d 69 6e 00 00 00 00 00 00 00 00 00 00 00"
6. Now your password should reset back to "admin"

Note that your user name is not changed, so you need to use the same user name.