QueryEx Dataset datetime results ignores Time Zone

Hello,

I'm working with Sharepoint 2010 Enterprise and VS2010 (.net 3.5), my regional settings has a TZ of "-3" and all of Sharepoint sites are configured the same way.

If I view the properties page of a document inside of a document library, the datetime shows fine, but if I use the web method QueryEx to get the same document, the property returns the time part without "-3", for example:

properties window: "2011-05-06 18:55:50" OK

QueryEx: (value inside dataset XML: "2011-05-06T21:55:50-3:00") result in dataset value: "2011-05-06 21:55:50" FAIL

any ideas??

thanks a lot,

Mauricio.

Mauricio