Data Validation List Macro

Hay all,

I am working in Excel 2010, I created 2 Macros that copy colored cells from one worksheet to another, and they work fine. I also created a Data Valadiation drop down list and I am calling the Macro from with in the Data Validation list. The script runs but is cycles over and over until it eventually fails. can someone please let me know if I am donig something wrong here, thanks.

Data Validation list Code:

Select Case Range("C4")

Case "DC OFFICE"
DC
Case "LA OFFICE"
Case "NY OFFICE"
Case "MU OFFICE"
MU

End Select

End Sub


MACRO CODE

Sub DC()
'
' DC Macro
'

'
Sheets("Sheet3").Select
Range("C2:H8").Copy
Sheets("Sheet1").Select
Range("C6:H12").PasteSpecial Paste:=xlPasteColumnWidths, Operation:=xlNone, _
SkipBlanks:=False, Transpose:=False
ActiveSheet.Paste
Application.CutCopyMode = False
Range("C6").Select

End Sub