TransformerConfigurationException with xalan 2.2.D11

[Lucio Pe�a]

Hi!, can anyone help me? I'm using Xalan 2.2.D11 and when I run the command 
line utility
"java -Duser.language=en org.apache.xalan.xslt.Process -in AgentesBIA.xml 
-xsl C:\dcb\xsl\xhtml\mybook.xsl -out AgentesBIA.html"

I obtain an exception
"SystemId Unknown; Line 0; Column 0; XSLT Error 
(javax.xml.transform.TransformerConfigurationException): 
javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: 
File "C:\dcb\xsl\xhtml\mybook.xsl" not found."

but C:\dcb\xsl\xhtml\mybook.xsl exits!!. If the xsl file is in the xml 
file's directory all is OK.

Thanks in advance
                Lucio