Error while creating IS doc type from xsd

Hi All,
I’m trying to generated IS doc type from xsd and I’m getting the following error.
Any idea about this error?

Couldn’t compile
[ITU.0001.0002] Host name could not be found on the network.

My understanding is integration server is referring to Microsoft site to validate/refer the schema and IS can not access the server. I have used xml spy to validate the xsd and it looks valid. Here is the top part of xsd
<xsd:schema targetNamespace=“schemas-dart-com:sql:InvoiceHeader” xmlns:schema=“schemas-dart-com:sql:InvoiceHeader” xmlns:xsd=“XML Schema” xmlns:sqltypes=“” elementFormDefault=“qualified”>
<xsd:import namespace=“” schemaLocation=“” />
<xsd:element name=“InvoiceHeader”>
Thank you,

It seems that [url][/url] is not accesible from your network. Why dont you download this XSD to local and change the schemaLocation to local location. Hope it works.