Sounds like a bug in the firmware code for the Web GUI. You shouldn't be seeing msgs like that.
You are accessing router via your browser?
Looks like it needs a re-flash of its firmware or a newer version.
EDIT: Do you mean a DSL-2740R? No 2780 listed in DLink site but a DSL-2740R that has a v 1.13 f/w and also a v 1.16 later one.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
Edited by XRaySpeX (Sat 04-Feb-12 00:29:19)