[Connect] c# Display Rules - AreaPatternAction

Hi,
I have the following problem with creating a display rules action:
I would like to create a pattern that applies a pattern by selecting a pattern from a cell library.
This is the code I wrote

long elemId = 0;//1,2,3,4,5,6,7
ElementId elementId = new ElementId(ref elemId);

AreaPatternAction.AreaPatternParams patternParams = new AreaPatternAction.AreaPatternParams(
                elementId, 1, false, 45, 5, 1, 1);
IDisplayRuleAction ruleAction = new AreaPatternAction(patternParams, dgnFile);

displayRuleElement.AddAction(ruleAction);

In the file, in which I want to create the display rules, I hooked a cell library but the result is the following

the cell model is empty.

I suppose the problem may arise from how I calculate the ElementId object

Any ideas on this?

thanks for the help,

greetings

Salvio