After the hackshield appeared, did you see the GAMANIA and KOG screens? and did you successfully saw the loading screen?
One solution that i'm thinking of is replacing your elsword.exe file or something like that(please search the forum about this there is lots of problems concerning this)
If all else fails do a clean un-install of your elsword then re-install
Don't do the re-installing it's a pain in the butt for HK elsword only resort to it lastly
BTW, did you recently downloaded all the recent patches yet? if not, there's a guide for fast patching for HK Elsword done by Enky