If you typed in chmod wrong it would tell you that you don't have permissions when you try to run it. Now you said you typed it in "24onlineClient -s" and there's nothing, not even a warning message saying it can't find the file specified?

[edit] I just noticed this, did you type in chmod and nothing happened so you don't know what to do? Because if chmod works nothing shows on the screen, it only tells you if something went wrong. If that's the case you need to type in "/root/24onlineClient -s" now and then you should get the prompts.[/edit]