Dashboard Design - Thresholds

Hi,

i just designed my first vFoglight Dashboard but some Components won´t work the way i like it.

On my Dashboard are views for CPU, RAM, HDD, Network (Utilization, CPU Percent Ready, Disk Read and Write Rate) and so on. I created Thresholds for it, that it is colored green, yellow, orange and red.

It works with CPU Utilization and some other Views perfect but i can´t define it for my Disk Usage, Memory Granted and Memory Consumed.

I created a Threshold for it but it won´t work. These Views are shown blue.

Can someone give me advice please ?

Jochen