Dear Sir Please help me My watch can't touch screen and i can't return to stock

Dear Sir and all concern ,

I got the problem on my Huawei watch , Touch screen isn't work and now i try to return to stock by following this method http://forum.xda-developers.com/huawei-watch/general/guide-return-to-stock-huawei-watch-t3219596

I can using Fastboot abd follow on this step

fastboot flash boot boot.img
fastboot flash recovery recovery.img
fastboot flash system system.img

But i can't flash System.img file sir it said " that target reported max download size of 63963136 bytes
Invalid sparse file format at header magi "

And now i don't have no idea what i can do after this sir .
I love this watch and i don't want to loss it

Thank you for kind support and so sorry for poor English