Dymo Label Printer doesn't work anymore for me in c#

Question

i hope someone can help me out.

i was using dymo.label from nuget but i changed it to the dymoSDK but it doenst work anymore. I got an application programed with c# with windows forms

the old code was

                DymoAddIn.Open("c:\\reffile\\files\\output\\artikel.label");
                DymoLabels.SetField("pieces", "store:  " + some + "  " + some2);
                DymoAddIn.StartPrintJob();
                DymoAddIn.Print2(1, false, 2);
                DymoAddIn.EndPrintJob();

can someone help me out with this problem? how to start printing ? how to change my label?

i'm using

using DymoSDK.Implementations;
using DymoSDK.Interfaces;