delta-t script + dummy thermometer not switching

[FlyinGNL]

hello,

yesterday i add a delta-t lua script i found to my Raspberry 2 domoticz and a dummy thermometer. The script is running well and the dummy thermometer tells me the difference from 2 ds18b20 sensors.

With a blockly i want to switch my solarpump.

for some reasen blocky is't switching my elro switch on data from the delta-t themperature

i changed the blockly output (different elro and gpio21) outputs are working well.
i changed the blockly input. (changed to other ds18b20 sensor) switching okay

What is the problem?

regards Eric,