health system and gui update

hi , i hit other player , but instead of lowing his health gui my gui health got lower , the game start with health gui , but in the network game when some one shoot other one the gui of the shooter got lower even that the shooted one got hit, after a while the got shoot one die as its supposed to be , but the problem is , just the gui indicator .

i think , the wrong gui got updated , i mean when the health decreased the wrong gui updated . instead of answering me and solve this problem , can any one give me a solution for updating the health gui indicator by network . thanks.