public key auth problems

[Axel]

Hello,

I have dropbear 0.47 installed (OpenWRT). The key is type rsa with 2048 
bits. The client is MacOSX.
My problem is: I can't get pubkey auth to work. There are no error 
messages concerning pubkey auth.
Does someone have a hint for me what maybe wrong? Did I forget something 
obvious? Thanks.

Greets

Axel

---on server ---
root at linksys:~# dropbear -E -F -s -p 5555
[544] Jan 17 00:30:10 Not forking
[545] Jan 17 00:30:58 Child connection from 10.x.y.z:49184
[545] Jan 17 00:31:00 exit before auth (user 'root', 0 fails): Exited 
normally
---

--- on server ---
# ls -la /root
drwx------    1 root     root            0 Jan 16 21:00 .
drwxr-xr-x    1 root     root            0 Jan  1  2000 ..
drwx------    1 root     root            0 Jan  1 23:06 .ssh
[...]
# ls -la /root/.ssh
drwx------    1 root     root            0 Jan  1 23:06 .
drwx------    1 root     root            0 Jan 16 21:00 ..
-rw-------    1 root     root          397 Jan 16 22:34 authorized_keys
---


--- on client ---
xl at pax:~$ ssh -i .ssh/privat/linksys -v -p 5555 root at 10.y.z.x
OpenSSH_3.8.1p1, OpenSSL 0.9.7i 14 Oct 2005
debug1: Reading configuration data <homedir>/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: Connecting to 10.y.z.x [10.y.z.x] port 5555.
debug1: Connection established.
debug1: identity file .ssh/privat/row type 1
debug1: Remote protocol version 2.0, remote software version dropbear_0.47
debug1: no match: dropbear_0.47
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1
debug1: Miscellaneous failure
No credentials cache found

debug1: Miscellaneous failure
No credentials cache found

debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client blowfish-cbc hmac-md5 zlib
debug1: kex: client->server blowfish-cbc hmac-md5 zlib
debug1: sending SSH2_MSG_KEXDH_INIT
debug1: expecting SSH2_MSG_KEXDH_REPLY
debug1: Host '10.y.z.x' is known and matches the RSA host key.
debug1: Found key in <homedir>/.ssh/known_hosts:98
debug1: ssh_rsa_verify: signature correct
debug1: Enabling compression at level 6.
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: .ssh/privat/linksys
debug1: Authentications that can continue: publickey
debug1: No more authentication methods to try.
Permission denied (publickey).