Hi! Isaac... It's been a long time that I have the same problems as you. I
corrected some, but not all of them. I can list the problems, if you want:

- problem: object com not recognised; solution: change the property
comvisible of file assembly. the propety must be "true".

- You must install O2003PIA.exe and vstor.exe for run the automation add-in
create by VSTO.

- You must have the .NET Framework 2.0 installed

- If your add-in is visible in Excel, but not his functions, you must change
the declarations of functions. The functions declared as Static doesn't
appear in Excel.

It works fine in my computer, but unfortunantely my automation add-in
doesn't work in another computer ... If you trouve une solution, write me
please.

thank you!