Hi all
The issue we are all having is due to the old version of iTunes. If you want to download any new songs, you have to install iTunes version 8, compatible only with Windows XP and Vista.
I am running Windows 2000 OS which is not compatible with the latest version of iTunes.
I would like to pass on to you the response I got from iTunes store support:
+I understand that you are unable to download any songs from the iTunes Store. I am very sorry to hear you have run into this issue. I'd like to thank you for your interest in the iTunes Store.+
+To use iTunes, your computer must meet the system requirements listed here:+
+
http://www.apple.com/itunes/download+
+The sales and service policies for the iTunes Store are available here:+
+
http://www.apple.com/legal/itunes/ww+
+If your system doesn't meet the requirements there is nothing further that Apple can do. I apologize for the inconvenience that this has caused.+
+We greatly appreciate your understanding. Thank you for contacting the iTunes Store Support Team. Take care Jasna!+
+Best Wishes,+
Brooke
+iTunes Store Customer Support+
+Please Note: I will be working Monday Tuesday, Thursday and Saturday this week.+
+Thank you for allowing me the opportunity to assist you. You may receive an AppleCare survey email; any feedback you provide would be greatly appreciated.+
So if you have older version of iTunes and your system is not compatible with the requirements, you will have to spend some money to upgrade your computer and OS if you want to download from iTunes again.