Do you known where it stores this pack? You need to download the file it says is missing CodeChickenLib-1.7.10-1.1.1.101-universal.jar and replace it . also are you using the 2.0.x.x version of crack pack?
Also in the settings tab of ATL change the amount of ram mc uses make it higher.
Also in the settings tab of ATL change the amount of ram mc uses make it higher.