pardiso Memory leak?

I feel very puzzled with the Win32 Pardiso version.

My integrated enviroment is Intel(R) Visual Fortran Compiler XE 12.1.7.371.

My matrix has 5 million non zeros ,and n =200,000 , real and symmetric indefinite

 I first test the memory I could use(1022M could be used), then I call pardiso to do the 23 phase,then call pardiso to do the -1 phase;

then I test the memory I could use again,

I fould that only about 700 M Memory that could be used.

What should I do? Theoretically I could use 1022 M Memory again.

This doesnt happen under win64.

Hope for the reply.

Thanks.