I'm trying to install tekkit i'm clicking play to start it but when it gets to a certain point this message comes up "error downloading file for the following pack: Tekkit. Failed to download http://resources.download.minecraft.net/ad/ad126e435cca94054bf0d616301799a105526cde. Please consult the mudpack Author"
Can anyone tell me how to fix this problem
Thanks heaps,hazza