error while downloading

After about 2.1 gb of downloading the mountain lion from the app store , it started saying that an error has occurred.

I tried to re-download the mountain lion, by entering the content code again in the redeem code section and it says that the code has already been used. I dont understand what to do.

the status that is being shown in the launchpad is " Waiting" under the mountain lion icon.

so i went to my account and clicked unhide purchases, and then the os lion starts download ing from the begining. The 2.6 gb that I painfully downloaded has now to be downloadded again. I am so frustrated.

Also when the display falls asleep but the computer is still on, then also the download stops... i mean what is this

Kindly help.

My internet connection is about 1.5 Mbps

pranav429@gmail.com

Seriously please reply to me fast, really worrried