How to fix Error ITMS-3000?

There is an error, when I use Application Loader to upload pkg.

http://chuantu.biz/t2/24/1454297390x-1376436667.png

Error ITMS-3000


I use Packages to generate pkg.

How to add the required element "checksum"? How to fix this problem? Please help me!

How to fix Error ITMS-3000?
 
 
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