public static XPathNodeIterator SQL2XML(string sqlexpression)
        {

            return utils.SQLstuff.SQLXml(sqlexpression, umbraco.GlobalSettings.DbDSN);

        }

        public static XPathNodeIterator SQL2XML(string sqlexpression , string connectstring) {

            SqlConnection conn = new SqlConnection(connectstring);
            conn.Open();
            XmlReader xreader = SqlHelper.ExecuteXmlReader(conn, CommandType.Text, sqlexpression + " FOR XML AUTO");

            return new XPathDocument(xreader).CreateNavigator().Select(".");
           

        }

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:Stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
<xsl:stylesheet
    version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:msxml="urn:schemas-microsoft-com:xslt"
    xmlns:umbraco.library="urn:umbraco.library"
  xmlns:jesper.utils="urn:jesper.utils"
    exclude-result-prefixes="msxml umbraco.library jesper.utils">


<xsl:output method="xml" omit-xml-declaration="yes"/>

<xsl:param name="currentPage"/>

<xsl:template match="/">

  <xsl:variable name="sqlstuff" select="jesper.utils:SQL2XML('select * from cmsContent')"/>
  <xsl:copy-of select="$sqlstuff"/>

 
</xsl:template>

</xsl:stylesheet>

<?xml version="1.0" encoding="utf-8"?>
<XsltExtensions>
   <ext assembly="/bin/jesper.umbracoutils" type="jesper.umbracoutils.library" alias="jesper.utils" />
</XsltExtensions>

    <xsl:variable name="sqlstuff" select="jesper.sql:SQLXml('select * from testtable','Server=127.0.0.1;Database=umbBabygogogo_303;User ID=ferrari;Password=ismine;Trusted_Connection=False')"/>

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE xsl:Stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]> 
<xsl:stylesheet   
    version="1.0"   
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"   
    xmlns:msxml="urn:schemas-microsoft-com:xslt" 
    xmlns:umbraco.library="urn:umbraco.library" 
    xmlns:jesper.sql="urn:jesper.sql"
    exclude-result-prefixes="msxml umbraco.library jesper.sql">

 
 
<xsl:output method="xml" omit-xml-declaration="yes"/> 
 
<xsl:param name="currentPage"/> 
 
<xsl:template match="/"> 
 
  <xsl:variable name="sqlstuff" select="jesper.sql:SQLXml('select * from cmsContent')"/> 
  <xsl:copy-of select="$sqlstuff"/> 
   
     
</xsl:template>

Server Error in '/' Application.

Could not load file or assembly 'jesper.umbracoSQL' or one of its dependencies. Access is denied.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IO.FileLoadException: Could not load file or assembly 'jesper.umbracoSQL' or one of its dependencies. Access is denied.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

Assembly Load Trace: The following information can be helpful to determine why the assembly 'jesper.umbracoSQL' could not be loaded.


WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog

<location path="." inheritInChildApplications="false"> </location>

Server Error in '/' Application.
--------------------------------------------------------------------------------

Runtime Error
Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.

Details: To enable the details of this specific error message to be viewable on remote machines, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "Off".


<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.


<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
    </system.web>
</configuration>