hi, there is a solution for your problem.
you need to download the windows 98 version for the 24 online client s/w. once downloaded and saved on your computer, right click on the setup file and go to properties. in the properties go to compatibility, select the one which says run as windows 98.
this is a workaround as no one has bothered to upgrade the 24 online client to make it compatible with win 7. so, the idea is to download the version for win 98 and then turn on the compatibility mode as win 98.