Large database: op. sys. refuses to provide memory

Hello, my database is 19GB, I'm using Stata 12 SE and my computer is windows 7 - 64 bits 3GB RAM. I´m trying to load this large database in stata and the program shows this:

op. sys. refuses to provide memory
Stata's data-storage memory manager has already allocated 4g bytes and it just attempted to allocate another 32m bytes. The operating system said no.
Perhaps you are running another memory-consuming task and the command will work later when the task completes. Perhaps you are on a multiuser system that is
especially busy and the command will work later when activity quiets down. Perhaps a system administrator has put a limit on what you can allocate; see help
memory. Or perhaps that's all the memory your computer can allocate to Stata.
r(909);

and this is the query memory:


-------------------------------------------------------------------------------------------------------------------------------------------------------------------
Memory settings
set maxvar 2048 (not settable in this version of Stata)
set matsize 400 10-800; max. # vars in models
set niceness 5 0-10
set min_memory 0 0-1600g
set max_memory . 32m-1600g or .
set segmentsize 32m 1m-32g

what can I do? I need the entire database

thank you