Dear Atlassian Support,
I backuped the Jira XML file + Attachment folder.
Then i Import the Files in a Fresh Jira installation for some reason the folder wich the Attachment are in doesnt create new folders.
Wich resaults that when a customer reply to a E-mail it wont show it as a comment on the Jira site.
Disabling the Attachment function lets resaults the function to work again.
Sincierly
Starke