PIC24FJ64GA004 BootLoader

[huhaomcu]

why the software can only be download once and the second display timeout?

Initiating write...
Creating port: USB Serial Port (COM3)
Opening port USB Serial Port (COM3)@9600
Searching for bl .
Found PIC24FJ64GA004 fw ver. 4.0.3
Bootloader placement/size: 2/1
Waiting for the boot loader to be ready...ok
Hex file successfully parsed in 0ms
Writing flash....
Erasing page 0 @ 0x0000...ok
Writing row 0 @ 0x0000...ok
Writing row 1 @ 0x0080...ok
Writing row 2 @ 0x0100...ok
Writing row 3 @ 0x0180...ok
Writing row 4 @ 0x0200...ok
Writing row 5 @ 0x0280...ok
Writing row 6 @ 0x0300...ok
Writing row 7 @ 0x0380...ok
Erasing page 40 @ 0xA000...ok
Writing row 320 @ 0xA000...ok
Writing row 321 @ 0xA080...ok
Writing row 322 @ 0xA100...ok
Writing row 323 @ 0xA180...ok
Writing row 324 @ 0xA200...ok
Writing row 325 @ 0xA280...ok
Writing row 326 @ 0xA300...ok
Writing row 327 @ 0xA380...ok
Write flash succeded
Closing port
Tx 3.1kB / Rx 22 bytes / 4.2s





Parsing hexfile...
File timestamp: 2013/5/9 13:20:22
Opening hexfile...ok
Validating hexfile...ok
Last row containing configs was found in hex file, last page has been disabled. Consult the main manual for more information.
Flash page 0 is used, 0x00 - 0x3FF
Flash row 0 is used, 0x00 - 0x7F
Flash row 1 is used, 0x80 - 0xFF
Flash row 2 is used, 0x100 - 0x17F
Flash row 3 is used, 0x180 - 0x1FF
Flash row 4 is used, 0x200 - 0x27F
Flash row 5 is used, 0x280 - 0x2FF
Flash page 42 is used, 0xA800 - 0xABFF
Flash row 343 is used, 0xAB80 - 0xABFF
Bootloader start address: 0xA400
Bootloader end address: 0xA7FF
Bootloader start page: 41
Bootloader end page: 41
Bootloader start row: 328
Bootloader end row: 335

Initiating write...
Creating port: USB Serial Port (COM3)
Opening port USB Serial Port (COM3)@9600
Searching for bl . . . . . . . . . . . . . . . . . . . . timed out
Closing port
Tx 20 bytes / Rx 0 bytes / 10.2s
Write failed