[Zope] [URGENT] Problem with upload of HQX files

Hello, I have a problem when i upload .HQX files (application/mac-binhex40) with my Zope site : the process doesn't finish.. and the more time passes, the more it use use memory..... and it uses near 95 % of the CPU time of my server. The file is never uploaded and the process never finish, so the only solution is to shutdown my Zope server and restart...... CAN SOMEONE HELP ME ? I can't restart my production site each time someone upload a HQX file... Zope : 2.4.4 Binary release for Windows Os : Windows NT Server Thanks in advance. Fred.