NotSoFamous

Hi. Ive been playing minecraft with forge 1.6.4 for a while and since i updater forge to 1.7.2 it wouldn't load. I mean i can still play forge 1.6.2 just not the 1.7.2 even tough ive all the necessary things to run it. when i run it i get this message: Finished downloading C:\Users\NotSoFamous\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.3\authlib-1.3.jar for job 'Version & Libraries': Couldn't connect to server (responded with 403) but have local file, assuming it's good Couldn't download https://s3.amazonaws.com/Minecraft.Download/libraries/net/minecraft/launchwrapper/1.9/launchwrapper-1.9.jar for job 'Version & Libraries' java.lang.RuntimeException: Server responded with 403 at net.minecraft.launcher.updater.download.Downloadable.download(Unknown Source) at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(Unknown Source) at net.minecraft.launcher.updater.download.DownloadJob.access$0(Unknown Source) at net.minecraft.launcher.updater.download.DownloadJob$1.run(Unknown Source) at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Gave up trying to download https://s3.amazonaws.com/Minecraft.Download/libraries/net/minecraft/launchwrapper/1.9/launchwrapper-1.9.jar for job 'Version & Libraries' Job 'Version & Libraries' finished with 1 failure(s)! if anyone can help me please do thanks.