<xsl:result select="concat(theString,theOtherString)"/>

that looks for two child elements <theString> and <theOtherString>
you want
<xsl:result select="concat($theString,$theOtherString)"/>
                           ^          ^
                           ^          ^
                           ^          ^
                           ^          ^

david

_____________________________________________________________________
This message has been checked for all known viruses by Star Internet
delivered through the MessageLabs Virus Scanning Service. For further
information visit http://www.star.net.uk/stats.asp or alternatively call
Star Internet for details on the Virus Scanning Service.

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list