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AVRDude Device code: 0xffffffff = (unknown)

Hi friends,
I am making use of AVR Evaluation board v3 and ATMega16A as IC, HEXA FILE has created, but while uploading the hex file it is showing me unknown device.
I tried on command prompt and given the command as

avrdude -p atmega16 -P com6 -c avr910 -v -U flash:w:led.hex

and it is showing in command prompt as follows

avrdude -p atmega16 -P com6 -c avr910 -v -U flash:w:led.hex

avrdude: Version 5.10, compiled on Jan 19 2010 at 10:45:23
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2009 Joerg Wunsch

System wide configuration file is "C:\WinAVR-20100110\bin\avrdude.conf"


Using Port : com6
Using Programmer : avr910
avr910_devcode (avrdude.conf) : 0x74
Overriding Baud Rate : 19200
AVR Part : ATMEGA16
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 5200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :

Block Poll Page
Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW Max
W ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ---
-- ---------
eeprom 4 10 128 0 no 512 4 0 9000 90
00 0xff 0xff
flash 33 6 128 0 yes 16384 128 128 4500 45
00 0xff 0xff
lock 0 0 0 0 no 1 0 0 9000 90
00 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 90
00 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 90
00 0x00 0x00
signature 0 0 0 0 no 3 0 0 0
0 0x00 0x00
calibration 0 0 0 0 no 4 0 0 0
0 0x00 0x00

Programmer Type : avr910
Description : Atmel Low Cost Serial Programmer

Found programmer: Id = ""; type = ª
Software Version = D. ; Hardware Version = ≡.∩

Programmer supports the following devices:
Device code: 0xffffffff = (unknown)
Device code: 0xffffffff = (unknown)
Device code: 0xffffffff = (unknown)
Device code: 0xffffffff = (unknown)
Device code: 0xffffffff = (unknown)

Can anybody solve this for me

and 1 more doubt is I am making use of atmega16a and I have selected the ic as atmega 16,whether it results in the uploading problem

 
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