Kudos for being persistant. Try this. Upload a photo to Photobucket. When that is accomplished, view the appropriate folder and mouse over the photo. You should see a series of options, one of which will be image code. Will look like this: [IMG]http:xxxxxx Copy this link and paste it into your Finescale post. Make sense?
Alternative, do a search in the forums of "posting photos". You should find one or two tutorials that descibe the process.
Don