how to retrieve all the data from a sharepoint list using CAML Query ?

Hey,

I am trying to retrieve data from a share-point list but I am not able to. Other thing I want to fetch the last modified date of the on an infopath form.

I am using this CAML Query 
"<Where><And><Leq><FieldRef Name='Modified' /><Value Type='DateTime'><Today /></Value></Leq><Gt><FieldRef Name='Modified' /><Value IncludeTimeValue='TRUE' Type='DateTime'>2013-08-08T17:11:52Z</Value></Gt></And></Where>"

But It's not working

Help me out !

Thanks