Hi, I hope you can find this all the way down here. May have been a good idea to post this as a second topic.

Sounds like you are using Windows Authentication under IIS. That means the administrators will have complete access to all COM objects, but, in this case, the "plain user" does not. You can check the DCOM Config and give that "plain user" access to Excel.Application. That is how you are supposed to do it (I don't remember the comand to bring up dcomconfig, you will have to google that). The reality of it is that this may not work. It IS Microsoft afterall. :-) Sorry! Anyway, you may have to change the permissions of the user account being used by "plain user"s to an admin account. Of course, you should realize that there are some potential security implications if you need to do this. But I have had a popular site running this way for 5 years with no problems so far.