SYMPTOMS:
On a computer that is running Microsoft Windows XP with Service Pack 2 (SP2), programs that connect to IP addresses that are in the loopback address range may not work as you expect. For example, you may receive an error message that says that you cannot establish a connection.

CAUSE:
This problem occurs if the program connects to a loopback address other than 127.0.0.1. Windows XP Service Pack 2 (SP2) prevents connections to all IP addresses that are in the loopback address range except for 127.0.0.1.
Source : http://support.microsoft.com/default.aspx?kbid=884020
Download Link : http://www.microsoft.com/downloads/d...DisplayLang=en

P.S. First Download Link I see with the Genuine Microsoft Software that we talk about on this thread