could not read Private Key username/password/ok/string from management interface

Binary package hint: network-manager-openvpn

Using a key that requires a password in a known-working (outside of network manager) setup, nm-ovpn does not provide the password to the VPN. Here's a snippet from syslog:

Mar 25 12:13:53 localhost NetworkManager: <info> Starting VPN service 'org.freedesktop.NetworkManager.openvpn'...
Mar 25 12:13:53 localhost NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.openvpn' started (org.freedesktop.NetworkManager.openvpn), PID 20850
Mar 25 12:13:53 localhost NetworkManager: <info> VPN service 'org.freedesktop.NetworkManager.openvpn' just appeared, activating connections
Mar 25 12:13:53 localhost NetworkManager: <info> VPN plugin state changed: 1
Mar 25 12:13:53 localhost NetworkManager: <info> VPN plugin state changed: 3
Mar 25 12:13:53 localhost NetworkManager: <info> VPN connection 'canonical' (Connect) reply received.
Mar 25 12:13:53 localhost nm-openvpn[20854]: OpenVPN 2.1.0 x86_64-pc-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [MH] [PF_INET6] [eurephia] built on Jan 26 2010
Mar 25 12:13:53 localhost nm-openvpn[20854]: WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Mar 25 12:13:53 localhost nm-openvpn[20854]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Mar 25 12:14:33 localhost NetworkManager: <info> VPN connection 'canonical' (IP Config Get) timeout exceeded.
Mar 25 12:14:33 localhost nm-openvpn[20854]: ERROR: could not read Private Key username/password/ok/string from management interface
Mar 25 12:14:33 localhost nm-openvpn[20854]: Exiting

ProblemType: Bug
Architecture: amd64
Date: Thu Mar 25 12:22:30 2010
DistroRelease: Ubuntu 10.04
NonfreeKernelModules: nvidia wl
Package: network-manager-openvpn 0.8-0ubuntu1
ProcEnviron:
 LC_COLLATE=C
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
SourcePackage: network-manager-openvpn
Uname: Linux 2.6.32-17-generic x86_64