I am new to DNN and document exchange so please forgive me in advance if I posted in the wrong section or left anything out.  We just upgraded from version 4 to version 5 on a site for a customer and they are having issues uploading files.  It was working before the upgrade.

A small file (under 15k) works ok, but anything larger hangs the upload process.  While it is hung, a portion of the file is being stored in the temp directory.  Each time it stores about 18K of the file and eventually it times out.  We have the timeout set to 8 minutes.  The progress bar shows a small percentage is complete, depending on the file size, then hangs.  A 1 MB file for instance shows 1-2% complete, then nothing further.

Anyone have any ideas on this?  Thanks in advance.