Did you clear the browser cache...try IE11 as well.
I presume if you have tried this, the unit maybe bad now. Usually if the file is sent in this mode, it should recover. If it does not, I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this. Ask for an RMA. We find that phone contact has better immediate results over using email.
Let us know how it goes please.