The problem with VFP is what VFP take all the memory avaliable and this may cause problems you can put this in your config.fpw file
=SYS (3050, VAL (SYS (3050, 1, 0)) / 3)
this can solve your problem
where the number 3 is the total memory/3 you can asign the memory what you aplication needs.

Sorry for my english!