ym_chaitu wrote:if u have done so try using the same drive letter in both the machines...
It is not recommended to use absolute paths on a USB stick rather relative paths so the USB remains portable no matter where you go.
If the server and the scripts are installed correctly on a USB, it should be completely portable or there is no real reason to use a USB as they are normally too slow to run a web server.
BTW a Google search similar to the one you used to find your link above has many such results of sites that give advise about installing a web server on a USB stick.
Your link is using a very old 1.5.4 version of XAMPP which is an indication of how old most of these tutorial are and no where in most of the tuts does it mention to use absolute paths over relative paths on a USB stick.
More importantly and on topic in this post, there are many sites that have tutorials on installing WordPress and it's database to a USB stick, here is just one of many:http://www.getusb.info/wordpress-on-a-usb-stick/