Desptive Programming for YahooMail

[Akhila]

After reading Ankur's post on Descriptive Programming I tried to write a small script for the yahoomail...script as follows
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Code:

Dim USERNAME
Set USERNAME = Description.Create
USERNAME("html tag").value = "INPUT"
USERNAME("name").value = "test.*"
SystemUtil.Run("www.yahoomail.com")
Browser("www.yahoomail.com").page("www.yahoomail.com").webedit("USERNAME").Set"testing"

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On script run error message displayed as "object 'browser' is not found in the object repository"
1) Using descriptive programming we can run the script with out having obejct in OR right?
2) Can any of you suggest the methods for correcting the script?
3) Can I use complete web address in the Browser name[as I used www.yahoomail.com]?

Thanks,