Rss Feed Creation?

HI
Q.1) i want to create a feed for my site www dot spasworldwide dot com.
but i m unable to do it.... plz tell me how can i create for the home page
when i use feedburner it shows me some error

Q2) and when i use feed4all s/w free version, feedvalidator validates it but when i add it on my page www dot spasworldwide dot com/events dot php
everything works fine but my feed does not gets updated automatically. Why?
Q3) Do we have to update our feed manually all the time or its updated automatically?

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