crosstool gdb6.6 from i686 to x86_64

[Sri Dharmasanam (sdharmas)]

I'm seeing this problem with gdb6.6 built using crosstool 0.43
 
host is a typical linux i686 system and the target is x86_64 smp linux
2.6.10.
 
The compiler version is 4.1.1 and binutils 2.16.
 
on the target, when I try remote debug:
 
%target% (gdb) target remote tcp:target_ipaddr:12312
Remote debugging using tcp:target_ipaddr:12312
Remote register badly formatted:
T0506:b0f3ffbf7f000000;07:f0f2ffbf7f000000;10:358170962a000000;
here: f000000;07:f0f2ffbf7f000000;10:358170962a000000;

 
on the host, I get:
./gdbserver hostipaddr:12312 --attach 2826
Attached; pid = 2826
Listening on port 12312
Remote debugging from host ipaddr
readchar: Got EOF
Remote side has terminated connection.  GDBserver will reopen the
connection.
Listening on port 12312


Any ideas what's wrong with my setup?

Thanks