Noob-needs-help

Hey guys, so I'm new to the technic pack, its my first mod pack ever. Here's the deal, I'm running windows 7 and 64 bit java. I can't launch the .exe so I went into my folders and launched the .jar All seems to be working fine, login works, I select Technic from the list and everything seems to be loading properly. But around 40% of loading minecraft.jar it stops, then converts to 40%Downloadfailed. Suggestions? :(