diff --git a/lib/mpw/config.rb b/lib/mpw/config.rb
index dd797d2..11f1e5c 100644
--- a/lib/mpw/config.rb
+++ b/lib/mpw/config.rb
@@ -19,7 +19,6 @@ class Config
 	# Constructor
 	# @args: config_file -> the specify config file
 	def initialize(config_file=nil)
-		@error_msg   = nil
 		@config_file = config_file
 
 		if /darwin/ =~ RUBY_PLATFORM
@@ -43,8 +42,7 @@ class Config
 	def setup(key, lang, wallet_dir)
 
 		if not key =~ /[a-zA-Z0-9.-_]+\@[a-zA-Z0-9]+\.[a-zA-Z]+/
-			@error_msg = I18n.t('error.config.key_bad_format')
-			return false
+			raise I18n.t('error.config.key_bad_format')
 		end
 
 		if wallet_dir.empty?
@@ -62,10 +60,8 @@ class Config
 			file << config.to_yaml
 		end
 		
-		return true
 	rescue Exception => e 
-		@error_msg = "#{I18n.t('error.config.write')}\n#{e}"
-		return false
+		raise "#{I18n.t('error.config.write')}\n#{e}"
 	end
 
 	# Setup a new gpg key
@@ -76,11 +72,9 @@ class Config
 	# @rtrn: true if the GPG key is create, else false
 	def setup_gpg_key(password, name, length = 4096, expire = 0)
 		if name.nil? or name.empty?
-			@error_msg = "#{I18n.t('error.config.genkey_gpg.name')}"
-			return false
+			raise "#{I18n.t('error.config.genkey_gpg.name')}"
 		elsif password.nil? or password.empty?
-			@error_msg = "#{I18n.t('error.config.genkey_gpg.password')}"
-			return false
+			raise "#{I18n.t('error.config.genkey_gpg.password')}"
 		end
 
 		param = ''
@@ -98,31 +92,24 @@ class Config
 
 		ctx = GPGME::Ctx.new
 		ctx.genkey(param, nil, nil)
-
-		return true
 	rescue Exception => e
-		@error_msg = "#{I18n.t('error.config.genkey_gpg.exception')}\n#{e}"
-		return false
+		raise "#{I18n.t('error.config.genkey_gpg.exception')}\n#{e}"
 	end
 
 	# Check the config file
 	# @rtrn: true if the config file is correct
 	def checkconfig
-		config = YAML::load_file(@config_file)
+		config      = YAML::load_file(@config_file)
 		@key        = config['config']['key']
 		@lang       = config['config']['lang']
 		@wallet_dir = config['config']['wallet_dir']
 
 		if @key.empty? or @wallet_dir.empty? 
-			@error_msg = I18n.t('error.config.check')
-			return false
+			raise I18n.t('error.config.check')
 		end
 		I18n.locale = @lang.to_sym
-
-		return true
 	rescue Exception => e 
-		@error_msg = "#{I18n.t('error.config.check')}\n#{e}"
-		return false
+		raise "#{I18n.t('error.config.check')}\n#{e}"
 	end
 
 	# Check if private key exist
@@ -148,11 +135,8 @@ class Config
 		File.open(@config_file, 'w') do |file|
 			file << config.to_yaml
 		end
-
-		return true
 	rescue Exception => e 
-		@error_msg = "#{I18n.t('error.config.write')}\n#{e}"
-		return false
+		raise "#{I18n.t('error.config.write')}\n#{e}"
 	end
 	
 end
diff --git a/lib/mpw/ui/cli.rb b/lib/mpw/ui/cli.rb
index 9167c4d..957005b 100644
--- a/lib/mpw/ui/cli.rb
+++ b/lib/mpw/ui/cli.rb
@@ -34,17 +34,13 @@ class Cli
 		end
 		I18n.locale = language.to_sym
 
-		if @config.setup(key, lang, wallet_dir)
-			puts "#{I18n.t('form.setup_config.valid')}".green
-		else
-			puts "#{I18n.t('display.error')} #8: #{@config.error_msg}".red
-			exit 2
-		end
+		@config.setup(key, lang, wallet_dir)
+		@config.checkconfig
 
-		if not @config.checkconfig
-			puts "#{I18n.t('display.error')} #9: #{@config.error_msg}".red
-			exit 2
-		end
+		puts "#{I18n.t('form.setup_config.valid')}".green
+	rescue Exception => e
+		puts "#{I18n.t('display.error')} #8: #{e}".red
+		exit 2
 	end
 	
 	# Setup a new GPG key
@@ -54,8 +50,7 @@ class Cli
 		ask      = ask(I18n.t('form.setup_gpg_key.ask')).to_s
 		
 		if not ['Y', 'y', 'O', 'o'].include?(ask)
-			puts I18n.t('form.setup_gpg_key.no_create')
-			exit 2
+			raise I18n.t('form.setup_gpg_key.no_create')
 		end
 
 		name     = ask(I18n.t('form.setup_gpg_key.name')).to_s
@@ -63,8 +58,7 @@ class Cli
 		confirm  = ask(I18n.t('form.setup_gpg_key.confirm_password')) {|q| q.echo = false}
 
 		if password != confirm 
-			puts I18n.t('form.setup_gpg_key.error_password')
-			exit 2
+			raise I18n.t('form.setup_gpg_key.error_password')
 		end
 
 		length   = ask(I18n.t('form.setup_gpg_key.length')).to_s
@@ -76,12 +70,12 @@ class Cli
 
 		puts I18n.t('form.setup_gpg_key.wait')
 		
-		if @config.setup_gpg_key(password, name, length, expire)
-			puts "#{I18n.t('form.setup_gpg_key.valid')}".green
-		else
-			puts "#{I18n.t('display.error')} #10: #{@config.error_msg}".red
-			exit 2
-		end
+		@config.setup_gpg_key(password, name, length, expire)
+
+		puts "#{I18n.t('form.setup_gpg_key.valid')}".green
+	rescue Exception => e
+		puts "#{I18n.t('display.error')} #8: #{e}".red
+		exit 2
 	end
 
 	# Setup wallet config for sync