Try this. Go back to your original spreadsheet. Go over under the title to File. Then choose Publish to the Web. Put that url with the '"pub" instead of the "cc" in the middle in your signature.
If you want it to say Timmy's SS, go to the beginning of the new url and type in [http=. At the end of that long url, type a right hand bracket ] Timmy's SS [/url]. Make sure all the brackets are the straight ones.
Hope that works! If not, send me a pm.