Parsing error

I'm new to parsing. I have separate XML and DTD txt files and I'm using SAX. Can anyone indicate why I get this error?

"Problem starting XML processor com.ibm.xml.parser.XMLReader#read: Invalid UTF-8 code. (bytes: 0x93 0x57)"

[240 byte] By [nick211001a] at [2007-11-27 10:45:20]
# 1

Because your XML document doesn't declare its encoding correctly. The parser believes the encoding is UTF-8; this may be because the document's prolog says so, or it may be because the prolog fails to state any encoding. However the encoding is not UTF-8.

DrClapa at 2007-7-28 20:12:22 > top of Java-index,Enterprise & Remote Computing,Enterprise Technologies...
# 2

Thanks,

The doc was wrong

nick211001a at 2007-7-28 20:12:22 > top of Java-index,Enterprise & Remote Computing,Enterprise Technologies...