MetaKeywords, MetaDescription

Question

hello.....

i am wishing to add MetaKeywords, MetaDescription for my website. my website has a master page named Site.master. Assume I have a Default.aspx, Default2.aspx pages and all are child of Site.master. Now If I am adding code given below in Default.aspx and Default2.aspx
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<%@ Page Title="" Language="VB" MasterPageFile="~/Site.master" MetaDescription="this is my meta description data" MetaKeywords="asp,php,my domain,coldfusion"%>
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it works fine on localhost. but when I am publishing it on webserver it displayes following error:
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Parser Error Message: Error parsing attribute 'metadescription': Type 'System.Web.UI.Page' does not have a public property named 'metadescription'.
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Is I have to declare some lines in Site.master page or in every child pages to work on hosting server too?


Urgent Help Needed

Thanks in advance