I'm new to efi live and need some help. I had version 7.5 and i copied my stock tune from my truck and saved it. I then had some tunes written for me so i installed a dsp5 tonight and went to install them and realized i needed v8 so i downloaded it. i then went to install the tunes in v8 and it said it couldnt connect with the v2 and make sure no other programs were using it. Then i went to start my truck with nothing connected and it wont turn over. So i went to v7.5 and installed my stock tune and it successfully installed and then i went to start the truck again and still nothing.. If anyone could please help me out i would appreicate it. My truck is an 04 LLY

Thanks,
Cory