Error al actualizar

Cada vez que intento actualizar el sistema me da el error de clamav-milter, y no puedo ni actualizar el sistema (Debian Wheezy) ni el panel que estoy en la version 1.1.13, todo fue a raiz del plugin de clamav

Esto muestra al ejecutar perl imscp-autoinstall

[ERROR]

autoinstaller::Adapter::DebianAdapter::installPreRequiredPackages: Reading package lists...
Building dependency tree...
Reading state information...
aptitude is already the newest version.
debconf-utils is already the newest version.
dialog is already the newest version.
liblist-moreutils-perl is already the newest version.
libxml-simple-perl is already the newest version.
resolvconf is already the newest version.
rsync is already the newest version.
wget is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up clamav-milter (0.98.7+dfsg-0+deb7u1) ...
clamav-milter: Can not continue with PidFile not set ... failed!
invoke-rc.d: initscript clamav-milter, action "start" failed.
dpkg: error processing clamav-milter (--configure):
subprocess installed post-installation script returned error exit status 6
Errors were encountered while processing:
clamav-milter
E: Sub-process /usr/bin/dpkg returned an error code (1)

iMSCP::Debug::END: Exit code: 100

el problema es que no puedo actualizarlo, por el error ese

apt-get purge clamav-milter

dpkg: error al procesar clamav-milter (--purge):
El paquete está en un estado muy malo e inconsistente - debe reinstalarlo
antes de intentar desinstalarlo.
Se encontraron errores al procesar:
clamav-milter
E: Sub-process /usr/bin/dpkg returned an error code (1)

Ya lo intente pero pasa lo mismo

Muchas gracias a mrpink por su inestimable ayuda, me solucionaste el problema, pero al actualizar, a 1.1.22 (a las de la versión 1.2.* me tiraba un error y no para probar actualice a esta, al editar un dominio me tira:

Dear admin,An exception has been thrown in file/var/www/imscp/gui/library/iMSCP/Config/Handler.php at line 87:=================================================================Configuration variable `PHPINI_ALLOW_URL_FOPEN` is missing.=================================================================Debug backtrace:---------------File: /var/www/imscp/gui/library/iMSCP/Config/Handler.php at line 74Method: iMSCP_Config_Handler::get()File: /var/www/imscp/gui/library/iMSCP/PHPini.php at line 146Method: iMSCP_Config_Handler::__get()File: /var/www/imscp/gui/library/iMSCP/PHPini.php at line 99Method: iMSCP_PHPini::loadDefaultData()File: /var/www/imscp/gui/library/iMSCP/PHPini.php at line 129Method: iMSCP_PHPini::__construct()File: /var/www/imscp/gui/public/reseller/domain_edit.php at line 253Method: iMSCP_PHPini::getInstance()File: /var/www/imscp/gui/public/reseller/domain_edit.php at line 1145Function: reseller_getData()