In Chapter 2 I overlooked the RSVP table setting for (Is Identity) and did not set it to "Yes".

Later in Chapter 10 I was able to create my first RSVP fine, but any subsequent RSVP attempts result in this error:

Cannot insert explicit value for identity column in table 'RSVP' when IDENTITY_INSERT is set to OFF.

Any idea how to fix this?

A co-worker advised me to delete the RSVP table and re-create it but that didn't help and I'm getting the same error.

I'm also seeking help on this issue here:
http://forums.asp.net/p/1543824/3770512.aspx#3770512