Hi I tried and it works great. Thank you. I changed the XWikiPreferences to override values for the wysiwyg editor but i will modify the vm file because the class takes too much time to be modify and we plan to have a lot of virtual wikis You are right. It works really good. Just i don't know why it did not in the past (we restarted the server). But we still have a problem with medium/big PPT (more than 15Mb). We have a timeout. Can we modify this timeout value ? We just made the migration to Office XP so don't expect the migration to Office 2007 before ten years (at least) ;-) Thanks to you and your team Christophe Périnaud -------------------------------------------------------------------------------- This e-mail is intended only for the addressee named above. It does not bind the sender, except in the case of an existing written convention with the addressee. This e-mail may contain material that is confidential and privileged for the sole use of the intended recipient. Any review, reliance or distribution by others or forwarding without express permission is strictly prohibited and may be unlawful. If you are not the intended recipient, please contact the sender and delete all copies. While reasonable precautions have been taken to ensure that this e-mail and any attachments are free from any computer virus or similar defect, no liability will be accepted in that respect. Anyone accessing this e-mail must take their own precautions as to security and virus protection. KBL European Private Bankers S.A., 43 boulevard Royal L-2955 Luxembourg, R.C.S. Luxembourg B 6395, T (352) 47 97 1