package tcpquota 1.6.15-13 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Helixtwice]

I was installing tcpquota with Synaptic, and attempting to configure it. I did not know my IP address, so I just hit enter, and for localhost I just put "localhost." I may have configured it wrong. I saw a line about the root user not being permitted.
Then I got the problem message. Synaptic is not closed yet. I will have to restart to continue.
I am using Ubuntu 12.04. Since I was installing it it must be the latest version.
I expected the install to complete, and then it repeated the same questions at the same time the package crash message came on screen.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: tcpquota 1.6.15-13
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Fri May 18 19:03:03 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
SourcePackage: tcpquota
Title: package tcpquota 1.6.15-13 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.tcpquota.tcpquota.cf: 2012-05-18T19:03:03.226763