You have 3 child elements under the second And element: And, Geq and Leq. 
It is not supported. Wrap Geq and Leq elements with an additional And parent element and it will work. 

Or, as suggested in other answers, use CAML query builder to generate your queries.

CAML query with Five Condtion throws an Microsoft.Sharepoint.SPException
When attempting to cancel a service or setting, "cancel" is the default action. What should the normal "cancel" button be called?

Redbox uses a playful "just kidding", which may not be appropriate in all circumstances.


