proftpd won't install from the repository and gives a dpkg error

OS is NCP2 Beta2.

$ sudo apt-get install proftpd
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  proftpd-doc
The following NEW packages will be installed:
  proftpd
0 upgraded, 1 newly installed, 0 to remove and 29 not upgraded.
2 not fully installed or removed.
Need to get 0B/906kB of archives.
After this operation, 70.7kB of additional disk space will be used.
Preconfiguring packages ...
(Reading database ... 37411 files and directories currently installed.)
Unpacking proftpd (from .../proftpd_1.3.1-6nexenta2-build1_solaris-i386.deb) ...
dpkg: error processing /var/cache/apt/archives/proftpd_1.3.1-6nexenta2-build1_solaris-i386.deb (--unpack):
 trying to overwrite `/usr/sbin/ftpshut', which is also in package sunwftpu
Processing triggers for man-db ...
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
fopen: Permission denied
Errors were encountered while processing:
 /var/cache/apt/archives/proftpd_1.3.1-6nexenta2-build1_solaris-i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)