How to Adjusting dimmer??

[colint]

Hello,

i am running domoticz 3.6792 on RPi 2, connected RFLink+Razberry+HarmonyHub.

i want to adjust the level of the dimmer when switching on the tv if the dimmer is on.

i tried this:
if (Ceiling-lamp) < (level(%) 25) and (TV) = (on)
set (Ceiling-lamp) = (level(%) 25)


but this is not working.

what is wrong??

Gr. Colin