How to change default font in Lotus Notes for a group of users?

I came across this solution in EE before but unable to find the thread again.
Basically I need to change the default font in Lotus Notes for our group of users.
I have tried the following suggested solution, but it didn't work. The font just did not change after we created the button. I have tried many font size as well but still didn't work.

At first I thought this may due to my signature which superseded this default font, however even after removing my signature and closed & reopened the client, it just didn't work.

FYI, my users are using Lotus Notes 6.5. Appreciate your advice to address this.

Thanks!

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1. Create a mail memo (save as draft so you can access it later)
2. Write your instructions of what you want them to do.
3. In the next line in the Body field of the memo, Select File>>Create>>Hotspot>>Button.
4. A small button will appear in the Body of the memo, and a Button dialog box will open.
5. Add a label to your button like: Please Click Here to Change Your Font. And configure the text properties using the rest of the tabs.
6. Close or move the dialog, so you can see the formula editor pane below the mail memo. You should see the "Label" you just typed, along
with a split editor pane.
In the right side, there is "Run: Client" and "formula" and space below those two fields to enter a formula.

Paste into that space:
@Environment( "StaticFont1" ; "Arial|0|26");
@Prompt([OK];"Font Changed!";"Thank you! The next time you open Notes the default font will be changed to Arial")

7. Click the Checkmark at the top of this pane to save and check the formula.
8. Click anywhere in the BODY of the memo to return to the memo. The editor pane will close.
9. Save the memo as draft, and then make a copy of that draft (else when you send it, you will have to go searching for it in the "sent folder" if you need to send it again).
10. Send it to a test PC that has some other default font set (you may want to set a visibly different font first on this PC so you can see the difference and if the button works). Run many tests.