Help needed in SQLXMLException

Hi, This is a problem that i'm encountering for more than a month. I'm clueless why this happens. It would be really nice if someone can help me on this issue.

I have a COM+ component to generate Word document report. It is bound to SQL Server 2005 and uses SQLXML (3.0) to retrieve data from the Database in XML form.

The problem is, when i make a call to the a public function in the COM+ component from my site, i get the following error

Type 'Microsoft.Data.SqlXml.SqlXmlException' in Assembly 'Microsoft.Data.SqlXml, Version=3.2.2917.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' is not marked as serializable.

I'm really clueless. kindly help ..

Thanks,

Vasant Bala