Deploying an Excel project for Excel 2003 AND Excel 2007

[silverear]

Hello everybody,

I have written an application that is running as an Office project
within Excel in C#. I created a setup project for my tool. When I
install my program on a machine that has Excel 2003 everything is
fine. If there is only Excel 2007 the installation will fail. If there
are both (Excel 2003 and 2007) installed, the installation is also ok.

My tool is running fine with Excel 2007, but I can't install it on a
machine that has only 2007 installed.

My question: How can I change my tool (or setup?) so that I will b
ableto install it on a machine that has only Excel 2007 installed?

Thanks in advance!

Regards

Patrick

P.S.: If this is the wrong group, please tell me where to ask else.