I don't know what's going on. Please help.

I try and add files to Vault, about 20MB worth. No file is over 1MB.
Everything uploads until:
[3/21/2005 9:08:20 PM] Ending the transaction
[3/21/2005 11:07:18 PM] Server unavailable for transaction end
[3/21/2005 11:07:18 PM] Transaction failed
[3/21/2005 11:07:19 PM] Item $/cc/Communities/Common/Images/HtmlTextBoxEditor/office2000/fontbackcolorpicker.gif caused the transaction to fail: Could not retrieve the file from the database.
[3/21/2005 11:07:21 PM] Transaction failed
The "Item" on the 4th line above changes to something else when I remove the said file. It seems as if it's not an issue with any said file.
As I tried various things, I also noticed this come up:
[3/21/2005 7:50:37 PM] Ending the transaction
[3/21/2005 7:51:16 PM] Server unavailable for transaction end
[3/21/2005 7:51:16 PM] Transaction failed
[3/21/2005 7:51:17 PM] Found and corrected problems with the a local baseline file. Retrying the transaction.
[3/21/2005 7:51:17 PM] Preparing data to begin transaction
... but even after it retried, I got the first error.
I'm using Client 2.06 and Server 2.06. Data chunks is set to off. Default Client setting.
Even when I switch to another machine and try add the files from there, same error, leading me to believe the error is server-side or file(s) are the culprit or...?
Help is much appreciated. This is stopping me from a deadline of getting a project into CVS for a client.
Thanks so much.

--Dave