attachment opening as zip IE

IE opens the xls,doc and ppt files as a zip file. After extracted also, no files will be there. To avoid this add the below lines in Apache conf. If needed add for other file extensions also.

AddType application/vnd.openxmlformats-officedocument.wordprocessingml.document .docx
AddType application/vnd.openxmlformats-officedocument.presentationml.presentation .pptx
AddType application/vnd.openxmlformats-officedocument.spreadsheetml.sheet .xlsx