I tried to upload my application to App Store but can’t archive my project in the xcode since it is grey out. I don’t know what to do since i am not experienced with xcode.
Try Analyze to verify if everything is correct.
Possibly you are targeting the Simulator for deployment which grays out the Archive option. Change it to an iPhone and it should become enabled.
See http://stackoverflow.com/questions/16050640/xcode-product-archive-disabled for more details.
bmwilson74, yes, this was the issue. Thank you!