SetSliderValue - data transmission between GH component


I’m trying to develop a Rhino interface in C# to control a GH process.
I use the function SetSliderValue and the value is well send to the GH slider but the data are not transmitted between GH component ? (c.f. image orange wire)
I have the same problem with Assign data to parameters.
I have no idea of the problem, is there a function to synchronize data in GH ?

Thank you in adavance for your help

Is that a winform? Sounds like you may need to call ExpireSolutions() here and there…

Yes, it works.
Thank you !