Force destination formatting

Hi,
sorry for this noob question but I'm searching thru the Internet and this forum for quite a while now..Without any results.. (Or I did not regarded them as results)

Situation:
I have a spread sheet in Excel 2010 where the user should copy and paste data from a IE window into.
I wanted to have a Macro that automatically chooses "Match destination formatting" when CTRL+V is used to paste.

The code:

Sub mk_paste_destmatch()
'
' mk_paste_destmatch Macro
' Always match destination formatting when pasting.
'
' Keyboard Shortcut: Ctrl+V
'
    ActiveSheet.PasteSpecial Format:="HTML", Link:=False, DisplayAsIcon:= _
        False, NoHTMLFormatting:=True
End Sub

The problem:
This works quite well when the user is actually pasting from the IE.
BUT: If the user uses CTRL+V for any other paste (e.g. to paste a cell or anything) it produces a
"Run-time-error 1004"
"PasteSpecial method for Worksheet class has failed"

I must admit that it goes beyond my skills to fix this...
Any advice how to solve this problem would be highly regarded.

Kind regards,
Krumel