Yeah, same problem here.
I recently had to format my computer. I downloaded the client and then downloaded the patch. As i installed the patch it come up updater failed. I then click OK and then it says updater successful.
When i then try to load the game, several different errors happen including. Critical error Occured!! ErrorCode: 0xA3C8
I click OK and then it gets to the launcher, it seems to then update. I hit 'play game' screen goes black then the error 'NavyFIELD.EXE has stopped working'
I've reinstalled several times and added data excecution thing in Win7.
I haven't been able to play for a week.
Any ideas?