I will not see the e-boot welcome message for recovery mode

Dear Sir, when i am try to upload os image from e-boot , Insert the SD card with eboot and OS image in the SD slot of our board. i did connect with RS232 to 24,25.26 pins on our viola plus board, usb connect to pc and run the tera terma, configured as 115200 baud, 8 data bits, one stop bit, no parity and restart the device press space button I will not see the e-boot welcome message on host. i think i am not done perfectly
please give me process how upgrade vybrid 1.3 to 1.4

Dear Ramanajneyulu,

The UART_A on Viola Plus carrier board is available on Pin nos. 26(TXD) & 27(RXD) of Extension connector.
You should use pin nos. 24, 26 & 27 instead of Pin nos. 24,25 & 26 of Viola Plus Extension connector.

Also, these UART signals on Viola Plus carrier board are of TTL level. You should use TTL level UART to USB converter to connect to your host PC.