xsd not working with infopath schema and people picker

hi...

I have an InfoPath form I am going to be using in a sharepoint sequential workflow.  when I run xsd.exe on the generated mySchema.xsd file, it errors out with the following:

Schema validation warning: The 'http://schemas.microsoft.com/office/infopath/2007/PartnerControls:Person' element is not declared. Line 83,
position 6.
Schema validation warning: The 'http://schemas.microsoft.com/office/infopath/2007/PartnerControls:Person' element is not declared. Line 76,
position 6.
Schema validation warning: The 'http://schemas.microsoft.com/office/infopath/2007/PartnerControls:Person' element is not declared. Line 69,
position 6.

Warning: Schema could not be validated. Class generation may fail or may produce incorrect results.

Error: Error generating classes for schema 'myschema'.
  - The element 'http://schemas.microsoft.com/office/infopath/2007/PartnerControls:Person' is missing.

~george