what could be wrong? After shutting the forum down I downloaded the db, made some changes (only data) and now I try to upload but after 99 % my CuteFTP says working, transferring, waiting, working ...etc. and give me the error-message: 550 xxxxxxxxxx.mdb: The process cannot access the file because it is being used by another process.
After quit a while it starts from scratch again. I did forget to logout but do that really make any difference?
I would suggest that you rename the file before uploading it and then rename it again when the upload is completed. That will allow you to overcome that situation, regardless of the cause.