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It wont launch, I tried uninstalling java and ftb, and a lot of other things, but it still isn't working, here's the link to the log. http://pastebin.com/5MgbAXdY
[SEVERE] [ForgeModLoader] There was a problem downloading the file bcprov-jdk15on-148.jar automatically.
[SEVERE] [ForgeModLoader] There was a problem downloading the file scala-library.jar automatically.
This is an old error and is caused by some of the older packs not being updated to include the two files listed above. Please look here to fix the problem.
Edit: You might also want to get the x64 version of Java so you can allocate more than 1.5GB.