i can´t open the NEM Client NIS don´t start! every time some errors and yes i have java 8 ... in 3 days i´m 2 weeks in holiday than i try it again... i hate it the same problems with the Nxt Client in the early stage dezember 2013 and now NEM

Well as I've said time and again.
You people need to give more information. "It doesn't work" won't get you a lot of help.
Tell us about your system.
Do you run standalone or webstart ?