[avr-chat] avrdude problem with avrisp v2

[R C]

Hi!

I have a board with a ATMega128 and 14.715MHz

I am using avrdude with an avrisp v2 (via usb -> serial converter because I don't have serial ports on my laptop) and it is working ok.

The problem comes when I connect a EDTP Airdrop A board (ATMega128L, 
7.372MHz) and avrdude command gives this answer:
"
avrdude: Version 5.4, compiled on Jun 14 2007 at 21:03:37
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/

         System wide configuration file is "/usr/local/AVR/etc/avrdude.conf"
         User configuration file is "/home/xxx/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port            : /dev/ttyUSB1
         Using Programmer      : avrisp2
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_2_ReceiveMessage(): timeout
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_2_ReceiveMessage(): timeout
"

Then, thinking that the board had a problem, I try to use AVRStudio (windows xp on my desktop, now with serial ports) on both boards:
I could program both with AVRStudio with the same avrisp v2 programmer (through serial port).

What could be the problem?

Thanks