what does this meen and how do i fix it

FTBLaunch starting up (version 1.3.8) Java version: 1.7.0_55 Java vendor: Oracle Corporation Java home: C:\Program Files\Java\jre7 Java specification: Java Virtual Machine Specification version: 1.7 by Oracle Corporation Java vm: Java HotSpot(TM) 64-Bit Server VM version: 24.55-b03 by Oracle Corporation OS: amd64 Windows 7 6.1 Launcher Install Dir: C:\Users\Feed the Beast\Desktop\FTB System memory: 1587M free, 3690M total AnalyticsBackgroundThread started Balance has selected Automatic:CreeperRepo DL ready [i18n] enUS English language file loaded! [i18n] Checking for updates ... Using download server Automatic:Maidenhead on host england1.creeperrepo.net (82.145.45.43) [i18n] remoteVer = 10 [i18n] localVer = 10 [i18n] Files are up to date [i18n] Fallback enUS loaded For input string: "’": java.lang.NumberFormatException: For input string: "’