conhecem este erro

Warning: simplexml_load_string() [function.simplexml-load-string]: Entity: line 4: parser error : XML declaration allowed only at the start of the document in C:\Arquivos de programas\VertrigoServ\www\teste\acessa.php on line 11Warning: simplexml_load_string() [function.simplexml-load-string]: <?xml version="1.0" encoding="ISO-8859-1"?><login> <id>3601</id> <nome></nom in C:\Arquivos de programas\VertrigoServ\www\teste\acessa.php on line 11Warning: simplexml_load_string() [function.simplexml-load-string]: ^ in C:\Arquivos de programas\VertrigoServ\www\teste\acessa.php on line 11