it looks like your usedrange hasn't been recognised (as it is still in
small letters)
try:

Range("A11").Select
Activesheet.Sort.SortFields.Clear
Activesheet.Sort.SortFields.Add
Key:=activesheet.usedrange _
, SortOn:=xlSortOnValues, Order:=xlAscending,
DataOption:=xlSortNormal
With Activesheet.Sort
.SetRange usedrange
.Header = xlYes
.MatchCase = False
.Orientation = xlTopToBottom
.SortMethod = xlPinYin
.Apply
End With

hth Carlo