I have a problem identical to one that was reported here previously and never resolved. I've been seeking assistance at the ASP.NET forum. You can see extensive documentation at this address; http://forums.asp.net/t/1705668.aspx/1?VS+cannot+handle+XSD+schemas+exported+from+Office+apps+
Where is there a Microsoft Office schema file that contains "JetType" and "SqlType"? Extensive web searching would tend to indicate that there is no such animal.