Is the feed generated by your CMS, or is it something you have to manually update?

Does your feed validate [validator.w3.org]?

i made a RSS feed

Ok, just how did you make this feed?

i download "Feed For All" feed generator and follow the simple steps there, it asked for title, description, link, pub date and item etc.

it gave me a xml file as output and i uploaded that in my website.

i don't know i have to update it or not.. plz let me know how to check it.

also after getting ur reply i checked my feed in some online validator site, and got following error:
Missing atom:link with rel="self"
</channel>

Plz let me konw, wat should be the further step.

i don't know i have to update it or not

A feed editor like that will require you to manually update, save and publish the feed yourself anytime you want to add something to your feed.

also after getting ur reply i checked my feed in some online validator site, and got following error:
Missing atom:link with rel="self"
</channel>

Missing atom:link with rel="self" [validator.w3.org]

Thanks a lot Bill for your replies...

i will follow that link and remove the error from my feed. But the thing i want is.. whenever i change anything in my website it should be automatically reflected in the feed, without doin anythng to feed. Is it possible?or everytime i have to upldate my feed. if possible then how..(please if you can give steps to do) i need detailed procedure as i m new one to make feeds.

Thanks a lot.

Even i made feed my self.. then made changes in it i.e. added items.. change description of few items, then i refresh my feed reader i.e. FeedDemon..

but still it is not showing any update in the feed. Plz let me know the reason behind it. the new feed which i made is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">

<channel>
<title>PC Tutor: A Complete guide to Learn Computers</title>
<link>http://www.example.com</link>
<description>Example.com is a comprehensive resource of categorized web development tutorials.

We intend to make it the richest online database of web development tutorials, including,

but not limited to, PHP and MySQL tutorials.Hello...Hello...Hello...Hello...</description>

<item>
<title>Course Details</title>
<link>http://www.example.com/course_details.php</link>
<description>Course Details, PHP course detail: Click here to get complete details of Free online course</description>
</item>

<item>
<title>What is PHP, and why do i need it?</title>
<link>http://www.example.com/php/phpc1p1.php</link>
<description>What is PHP, and why do we need it? Click here to learn more about PHP and its functions </description>
</item>

<item>
<title>What you need to get started with PHP</title>
<link>http://www.example.com/php/phpc1p2.php</link>
<description> Get started with PHP, Learn PHP. Easy A to Z guide which covers all contents of PHP description>
</item>

</channel>

</rss>

[edited by: bill at 8:37 am (utc) on Mar. 3, 2009]
[edit reason] Please use example.com instead of your own URL [/edit]

whenever i change anything in my website it should be automatically reflected in the feed, without doin anythng to feed.

If your site is database generated then you could automatically create a new feed entry when you created a new page/entry. Most blogs or CMS systems do this by default.