Namespace problem in Intranet

[HelpUs]

I am developing a site for our intranet. One of my page displays data from a XML data file using XML/XSLT. I found on the PC’s those do not have Internet connection, does not shows the data from XML. After little research I noticed that, this is due to the namespace declaration.

<xsl:stylesheet version="1.0"
xmlns:xsl="

http://www.w3.org/1999/XSL/Transform">

Can some one suggest what should I do; or what namespace should I user to let the page display correctly irrespective of any PC (whether connected to Internet or not)

Thanks