You really should update your software version, you are about 6 versions out of date and some the versions later than the 1 you are using here have some considerable security issues that could leave your site open to be attacked by hackers and viruses.
I'm not scare mongering there are some genuine security issue's that have lead to quite a lot of sites being attacked. SMF version 2.0 RC4 had to have a security patch rushed out because sites were being attacked and in some cases versions later than the 1 used here had the admin locked out of their own site and the sites had to be completely deleted and started again.