Workflow no longer working

Question

I had a workflow created by a very kind guy on here, and installed it, and it worked fine for about 5 days, but has now stopped working, and I can't find why.
Normally when you run it, you see the EDIT meny highlight before it enters the data, but this isn't happening now.
The workflow gets the date from the system, copies it to clipboard, and then pastes it into numbers.  Below is the code.
I've still got it installed on my home macbook air, and it is still working there.
It's still installed on the work mac, but it doesn't run or work properly.
Can anyone help?
set the clipboard to (do shell script "date +%H:%M")
tell application "Numbers"
          activate
          tell application "System Events"
                    keystroke "v" using {shift down, option down, command down}
          end tell
end tell
The workflow still exists in the automator, and it still has a shortcut attached as originally set, which is command-alt-'
I've noticed when I've tried to change the shortcut, that it often stops it working, and has to be reinstalled from scratch.
Also, the first time I ran it, it showed up in "numbers" in the automator under "app shortcuts" but it no longer does.

Answer 1

Adam,
Numbers 3 should be free if you had it on your machine before (you were using Numbers 3 before, right?).  In App Store you might try clicking 'Account' under Quick Links and Reset all warnings for buying and downloading. And, if necessary, also contact Apple to get that charge reversed.
I can't reproduce the script problem here. The fact that the Paste and Match Style is greyed seems to suggest that your copy of Numbers thinks there is nothing in the clipboard... Are you sure you don't have one of the many clipboard enhancement type applications on your machine?
To test that you could try manually copying text into the clipboard (from say, TextEdit) and check to see if Numbers accepts a paste.
Another thing to try: run the script from AppleScript Editor to see if you get the expected results from there.
And also try this:  Open Terminal and at the ~ prompt type this command:
    date +%H:%M
It should respond immediately with the time in 24-hour format.
If you do get the time as expeced and you can't the the original script to work again,  then try the script below, which avoids the clipboard.
SG
tell application "Numbers"
          set t to front document's active sheet's first table whose selection range's class is range
          tell first cell of t's selection range
                    set value to do shell script "date +%H:%M"
          end tell
end tell