Error parsing XSD, schema=iso-19115

Hi,

I'm able to validate and post metadata entered with the metadata editor (19115)
if I take this
xsdLocation="http://www.isotc211.org/2005/gmd/metadataEntity.xsd
out of the iso-19115-definition.xml file.

I get an error
???Error parsing XSD, schema=iso-19115 xsdLocation=http://www.isotc211.org/2005/gmd/metadataEntity.xsd
though if I leave it in.

Does somebody know what is going on here?

regards, Rune