Altera nios-debug via JTAG

Hi,

I have been trying to debugg a simple "hello world" program running in
an Altera Cyclone device with Nios 32 (including OCI-Core) via JTAG. I
can use serial comms for the upload but I need the serial
communications available during execution. The problem is that the JTAG
upload gives me the following error:



# 2005.08.29 13:34:24 (*) nios-init-mdi -i

WARNING: Do not attempt to use Quartus to re-program your device while
         GDB/Insight is connected.  (See nios_readme.txt for details.)


# 2005.08.29 13:34:24 (*) nios-gdb-server --ocibase=0x00100000
--tcpport=2342&

# 2005.08.29 13:34:24 (*) downloading m.out (please be patient)

# 2005.08.29 13:34:24 (*) nios-elf-gdb --command=/tmp/m_setup.gdb
# [nios-gdb-server] nios-gdb-server starting up
# [nios-gdb-server] accepting gdb connection
# [nios-gdb-server] connecting to OCI, ocibase 0x00100000
# [nios-gdb-server] ...using ByteBlaster (altlpt1)
# [nios-gdb-server] mdi error: found 0 devices instead of 1
# [nios-gdb-server] failed to connect



Any ideas why my ByteBlaster is not connecting? I have no problem using
the same LPT1 connection for uploading .sof files using the Quartus II
"Programmer" tool.

Thank you very much in advance.

/evan