yes... unfortunately we'll have to fix the problem in securityassist as well it appears.
The issue is that you have two versions of the security assist files in two sections of the site. This isn't something we can fix in framework itself.
Probably the best solution is to change all of the references in your site to point to the same securityassist file. It appears you have the same file in:
/dsmusic/register/WA_SecurityAssist/
and:
/dsmusic/WA_SecurityAssist/
maybe do a find in your site for:
WA_SecurityAssist/Helper_PHP.php
and make sure they all point to one location or the other and then the problem should go away.