[_Aleksandar]

OMG you must return false; not true...
here:

Код:

if(!strlen(inputtext)) 
    { 
        ShowPlayerDialog(playerid, DIALOG_LOGIN, DIALOG_STYLE_INPUT, ""WHITE"Login",""RED"You have entered an invalid password.\n"WHITE"Type your password below to login.","Login","Quit"); 
        return 1; 
    }

and here:

Код:

 if(strcmp(inputtext,PlayerInfo[playerid][Pass],false)) 
        { 
            ShowPlayerDialog(playerid, DIALOG_LOGIN, DIALOG_STYLE_INPUT, ""WHITE"Login",""RED"You have entered an incorrect password.\n"WHITE"Type your password below to login.","Login","Quit"); 
            return 1; 
        }

also you can return ShowPlayerDialog(playerid, DIALOG_LOGIN, DIALOG_STYLE_INPUT, ""WHITE"Login",""RED"You have entered an incorrect password.\n"WHITE"Type your password below to login.","Login","Quit"); without returning false...