>The PUBLIC and SYSTEM identifiers are case sensitive. Have a look at what >the DTD[1] says: >| This DTD module is identified by the PUBLIC and SYSTEM identifiers: >| >| PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" >| SYSTEM "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >For a list of valid DTDs see >http://www.w3.org/QA/2002/04/valid-dtd-list.html Yes, it was a problem with case sensitivity. Thank you.