Trying to change the default utilization value of 40% to higher value but it doesn't take it. Is there something I'm doing wrong? Just goes back to default value. This is on an interface 10/100MB Ethernet.
Exactly what version of DFM do you have? DFM 2.0 is very old, so I hope you're not using stock LMS 2.5.
If the settings are not saving at all (and you've clicked both Save and OK), this might be a browser issue. If you're using IE, try Mozilla. If you're using Mozilla, try IE.