Why is Excel VBA executing a command corretly if I run it in debug modus but not in "normal" modus?

So like the headline says: Why is Excel VBA executing a command correctly if I run it in debug modus, but in "normal" modus it does nothing?

It is about the command:

Shell "cmd.exe /k cd /d" & "N:\Preise\Makros\Felix\Temp\" & "&& FtpComm4.bat"