Tresholding W32 windows memory

[mktoon]

Hello,

Do you know how i can treshold windows memory ?
Actually, i'm getting memory information with wmi script.

I tried to treshold memory data, but it hangs my cacti server ...

Thanks for your help

cacti version 0.8.6i
thold version 3.2
web server apache 2.2.4
php version 5.2.0