gdbserver /gdb use on ARM/XScale help

I inherited a distribution for an IXP420 Xscale processor and tried to
use gdb without success. This is what I get on the target and on the
host (Debian). I did a search on this and it seems that :
1. I have to apply a patch
2. The cross-compile was not done properly
3. I have to upgrade my gdbserver.


Any insights?
Thanks.

<target> gdbserver :3000 /bin/<app>
Process /bin/<app> created; pid = 211
code at (nil) - (nil), data at (nil)
Remote debugging using :3000
readchar: Got EOF
Remote side has terminated connection.  GDBserver will reopen the
connection.


<host> arm-uclinux-gdb
GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-uclinux".
(gdb) target remote 192.168.4.1
192.168.4.1: No such file or directory.
(gdb) target remote 192.168.4.1:3000
Remote debugging using 192.168.4.1:3000
Couldn't establish connection to remote target
Reply contains invalid hex digit 59
(gdb)