please help

Im having some issues trying to get my forum to work.

I had the previous version 6.34 I think and I tried upgrading today and have been semi successful. What I havent been able to do is figure out why certain things under my admin menu are not working. I cannot set up my email notification and I cant administer any of the forums. I get error messages when I try

ADODB.Recordset error '800a0cc1'

Item cannot be found in the collection corresponding to the requested name or ordinal.

/forum/admin/forum_details.asp, line 163

I tried looking it up in help but that just confused me a little more.

I also cant make any new posts. I get this error

Microsoft JET Database Engine error '80040e21'

The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again.

/forum/post_message.asp, line 749

The forum is located at www.yea.org/forum Thank you

ADODB.Recordset error '800a0cc1'

Item cannot be found in the collection corresponding to the requested name or ordinal.

/forum/admin/forum_details.asp, line 114

error when I tried to add any forums.

I was reuploading everything Im still having problems and I dont know what to do the only difference between what was in the zip folder now and what I put up there was the edited common.asp where I pointed it to the database in our database directory