Here&#039;s the situation : Managers may upload files with a management site, and any employees may take a look at these files by another site. Those files are pdf, jpg, gif or txt files and these files may be attached to products in the database. <BR><BR> Here&#039;s my problem : when someone visualizes a file on the server using a browser, the server locks it for 45 seconds (i dont know why yet, neither if its possible to change it somewhere. ). If a manager try to upload a new version of this file during these 45 seconds , instead of overwriting the locked file, the library im using performs something that locks the file, causes an error to the manager and this file wont be overwritable or deletable.<BR><BR> If someone knows something about this file lock, i could easily use some help here.