Again, if you look at the Wiki page for MSSQL you will notice that in none of our sample configurations is there a URL property. Please just read the documenation and try it with: | xa-datasource-class>com.microsoft.jdbcx.sqlserver.SQLServerDataSource</xa-datasource-class> | <xa-datasource-property name="ServerName">localhost</xa-datasource-property> | <xa-datasource-property name="DatabaseName">pubs</xa-datasource-property> | <xa-datasource-property name="SelectMethod">cursor</xa-datasource-property> | <xa-datasource-property name="User">sa</xa-datasource-property> | <xa-datasource-property name="Password">jboss</xa-datasource-property> | Again, there is *no* URL property. Reading the documentation for your driver is *strongly* encouraged. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3987104#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...