urgent AVAMAR Gen4 installation prob

I'm installing Avamar Gen4 single node with Avmar 6.1, there is a network configuration problem appeared during instllation , but I have fixed by removeing dpnnetutil and using only etho , but no I'm not able to start the instllation again through installation manager because it stopped on the last status sying " installing " with the last error, I want to know how to reset that, and starting instllation, also I have tried to remove the backage and reboot the system but without luck, can you help please