retrive data between start and end date using CAML

Hi,

how can write CAML to retrive data between 2 dates (Startdate and end date).. like we use between in SQL server .(data image is below attached)

I write Query like this 

   osPQuery.Query = "<Where><And><And><Eq><FieldRef Name='Flag'/><Value Type = 'Number'>" + isactive + "</Value></Eq><Geq><FieldRef Name='StartDate'/><Value IncludeTimeValue='TRUE' Type='DateTime'> <Today/> </Value></Geq></And><Leq><FieldRef Name='EndDate'/><Value IncludeTimeValue='TRUE' Type='DateTime'> <Today/> </Value></Leq></And></Where> <OrderBy><FieldRef Name='ID' Ascending='FALSE'/></OrderBy>";

but not fetching any record....

Thanks