You might want to use the following command:
lcForeMem = SYS(3050,1,2000000) && limits FoxPro to using only 2Meg of RAM

According to either Hacker's guide of VFP help, VFP gobbles up as much memory as it can get and the previous instruction will limit VFP to the amount specified. You'll have to try different values to give your Fox app enough memory to run and still leave enough for WP.

HTH