Need to 'bless' files...

I had a few issues with my iMac some weeks back and had to 'Archive and Install' to start again. Prior to arriving at that action, I had uninstalled Hazel and other such items. So starting afresh, I've set up Hazel with just one rule to action against the NewDownloads folder:
------------------------------------------------
Description: Files opened in last 2 days
If all the following conditions are met:
Date last opened is in the last 2 days
Do the following:
Set colour label to "Green"
Run rules on folder contents
------------------------------------------------
Well the rule seems to run ok enough as I watched this by having a Console window open as well as the NewDownloads folder. The problem is that for some reason, the colour of a file that has been correctly processed by Hazel (as it appeard in the Console log) does NOT change to Green. I find I have to click on the file (i.e., bless it like in the old days of System 7 to 9) to have Finder realise and instantly update the colour to Green. Closing and opening the folder window has no effect. And it is not any one specific file that is effected.
Any ideas on what the problem could be?
Also, will the last line of the rule apply this rule to all sub-folders in the NewDownloads folder?
------------------------------------------------
Description: Files opened in last 2 days
If all the following conditions are met:
Date last opened is in the last 2 days
Do the following:
Set colour label to "Green"
Run rules on folder contents
------------------------------------------------
Well the rule seems to run ok enough as I watched this by having a Console window open as well as the NewDownloads folder. The problem is that for some reason, the colour of a file that has been correctly processed by Hazel (as it appeard in the Console log) does NOT change to Green. I find I have to click on the file (i.e., bless it like in the old days of System 7 to 9) to have Finder realise and instantly update the colour to Green. Closing and opening the folder window has no effect. And it is not any one specific file that is effected.
Any ideas on what the problem could be?
Also, will the last line of the rule apply this rule to all sub-folders in the NewDownloads folder?