GraphView NodePort cant connect (SOLVED)

Hello guys. Im trying connect 2 nodes at graphView, but my nodes cnt connect. IDK.
Both are of the float type and are of the same class. So I don't understand what I'm doing wrong

Code (CSharp):

1.             StateNode state = new StateNode();
2.             Port inputport = state.InstantiatePort(Orientation.Horizontal, Direction.Input, Port.Capacity.Single, typeof(float));
3.             Port outputport = state.InstantiatePort(Orientation.Horizontal, Direction.Output, Port.Capacity.Single, typeof(float));
4.  
5.             state.outputContainer.Add(outputport);
6.             state.inputContainer.Add(inputport);
7.        
8.             state.RefreshExpandedState();
9.             state.RefreshPorts();
10.  
11.             AddElement(state);

 

OK. Solution:
At GraphView:

Code (CSharp):

1.  public override List<Port> GetCompatiblePorts(Port startPort, NodeAdapter nodeAdapter)