Error to Open POS AX 2012 R3 cu12

hi Every One

i have a problem when i try to open POS the errors in event viewer are:

1. 

Unable to start the application. The application will shutdown.LSRetailPosis.PosStartupException: Section called AxRetailPOS was not found in configuration file: C:\Program Files (x86)\Microsoft Dynamics AX\60\Retail POS\POS.exe.config ---> System.Exception: Section called AxRetailPOS was not found in configuration file: C:\Program Files (x86)\Microsoft Dynamics AX\60\Retail POS\POS.exe.config

   at LSRetailPosis.Settings.ApplicationSettings.GetConfigFile(AppConfiguration& appConfig, String appExePath, String section)

   --- End of inner exception stack trace ---

   at LSRetailPosis.Settings.ApplicationSettings.GetConfigFile(AppConfiguration& appConfig, String appExePath, String section)

   at LSRetailPosis.Settings.ApplicationSettings.InitializeSettings(String[] args)

   at LSRetailPosis.POS.Program.InitializeAndLoadPOS(String[] args, Boolean owned, SplashScreenForm splashScreenForm)

   at LSRetailPosis.POS.Program.Main(String[] args)

2. 

LSRetailPosis.Settings.ApplicationSettingsSystem.Exception: Section called AxRetailPOS was not found in configuration file: C:\Program Files (x86)\Microsoft Dynamics AX\60\Retail POS\POS.exe.config

   at LSRetailPosis.Settings.ApplicationSettings.GetConfigFile(AppConfiguration& appConfig, String appExePath, String section)

3. 

LSRetailPosis.Settings.ApplicationSettingsLSRetailPosis.PosStartupException: Section called AxRetailPOS was not found in configuration file: C:\Program Files (x86)\Microsoft Dynamics AX\60\Retail POS\POS.exe.config ---> System.Exception: Section called AxRetailPOS was not found in configuration file: C:\Program Files (x86)\Microsoft Dynamics AX\60\Retail POS\POS.exe.config

   at LSRetailPosis.Settings.ApplicationSettings.GetConfigFile(AppConfiguration& appConfig, String appExePath, String section)

   --- End of inner exception stack trace ---

   at LSRetailPosis.Settings.ApplicationSettings.GetConfigFile(AppConfiguration& appConfig, String appExePath, String section)

   at LSRetailPosis.Settings.ApplicationSettings.InitializeSettings(String[] args)

all test connections with AsyncClien and AsyncServer are OK(use ). and the test Connection with store DB is Ok too (use Retail sailt configuration).

i have installed POS cliente again and the error is the same.

can you help with this issue?.

Thanks