HTML encode not working properly for URL

I am trying to generated a URL: Get-it-Together-Stavros-Zenonos-amp;-Katerina-Ko?viewmode=0Where you can see "amp;" after that url is not generating Like below: Get-it-Together-Stavros-Zenonos-ampSee my code below which is generating URL@a class="fb-xfbml-parse-ignore" href="https://twitter.com/intent/tweet?url=@%=HTMLEncode(CMS.DocumentEngine.DocumentContext.CurrentDocument.AbsoluteURL)%@" onClick="return popup(this, 'notes')"@ @img src="@%# Eval("twittericon") %@" alt="twitter icon" /@ @/a@ Could you help what i need to do to generate full URL?