captainsparklez ultra mod pack help

[fumle]

hey guys,

 

i have this thing going on with captainsparklez mod pack, i want to add atomic science to this modpack, but how the heck do i do that? every time i try, the launcher opens up the game, loads for a minutes, shuts down, and im at the launcher again... what could i do?

 

thank you

[plowmanplow]

You could post crash logs and/or ForgeModLoader logs.

[Eddybear1234]

I'm kinda new to the whole tekkit thing and wanted to try the UMS modpack but it gives me an error downloading message do you guys know how i can fix it???