What i do cause allway come error and error says "You Have specified an incorrect username. Please check your username and try again. If you continue to have problems Please contact the %Board Administrator%s. I did all the registering and logging in what i needed to do but it doesn't work. What's the problem?

Either you are typing your username and password wrong or there is something wrong with your login details.

Try creating a "iw4m.ini" file with notepad. Put your username on the 1st line and your password on the 2nd line and save it like this: http://gyazo.com/27276ff197eb57a113bb0c018f04b188