your system is not ready for use by Virtualmin.

i got this error when i check the configuration, how to fix it, i also change the permission of /tmp to 1777, but still i am having this problem

"The status of your system is being checked to ensure that all enabled features are available, that the mail server is properly configured, and that quotas are active ..

  BIND DNS server is installed, and the system is configured to use it.

  Mail server Postfix is installed and configured.

  Apache is installed.

  Webalizer is installed.

  Apache is configured to host SSL websites.

  MySQL is installed and running.

  ProFTPd is installed.

  Logrotate is installed.

  SpamAssassin and Procmail are installed and configured for use.

  The ClamAV program clamscan does not appear to be working properly :

  ERROR: Can't write to temporary directory

  ----------- SCAN SUMMARY -----------
  Known viruses: 802064
  Engine version: 0.96.1
  Scanned directories: 0
  Scanned files: 0
  Infected files: 0
  Data scanned: 0.00 MB
  Data read: 0.00 MB (ratio 0.00:1)
  Time: 5.878 sec (0 m 5 s)

  . Either change the program on the spam and virus scanners page, or disable this feature.

.. your system is not ready for use by Virtualmin."