STM8L151C6 USART Bootloader is not working?

[SKARU.51]

Hi,

I am using STM8L151C6 chip for my development.

I would like to program my application through USART boot loader option.

I configured Read Out Protection OFF and BL option bytes to 55 AA through ST Visual programmer.

When I am testing with "Flash Loader Demonstrator" from ST I am getting error like " No response from the Target, the boot loader can not be started. ".

Could you please help on this! Am I missing some configuration here.?

[SKARU.51]

Does any one have the same problem? or any settings I am missing here?