can't control led with system tag[T7A]

[zhenhai]

I'm trying to control the led on the front panel through system tags, but it seems no effect at all.

the internal tags I'm using are
SystemTagPowerLedBlueIntensity
SystemTagPowerLedBlinkFrequency

the version of developer is 2.0 sp1(2.0.463)

how could I solve this problem?

[zhenhai]

upgrade firmware from 73 to 803,problem is solved.