Endnote X7 Sync error

I have tried many times in a week, but the error “internal server error”  never go away.

Can anyone help me resolve the problem?

My Endnote X7 is not synching either. This is the data I get. Error Code: Server.ReferenceStore.internalError.

Please help.

Sync Details
Sync was last run: Tuesday, December 31, 2013 at 14:09:32 PM Central Standard Time
Sync Status: There are changes that need to be sent and received.
Error Code: Server.ReferenceStore.internalError
Error Message: An error occurred while updating reference

Local Sync Library
Library Name: zenlib-Saved.enl
Records: 2865
Groups: 5
Attachments: 127

Online Sync Library
Username: a-dandrea@uchicago.edu
Serial Number: 2051766395 (Premium until December 31, 2015)
Records: 2865
Groups: 5
Attachments: 0

Sync Limits
Number of Records: 1000000 (997135 can still be added)
Number of Groups: 5000 (4995 can still be added)
Number of Attachments: 5.00 GB (5.00 GB can still be added)

Also experiencing an EndNote X7.0.2 sync problem.  When auto sync is on the messages

‘Indexing pdfs’ and ‘Retrieving references’ appear for long periods, and although EndNote desktop can see EndNote basic, it won’t sync.  Any solutions?  Thanks