how to have 2 drop down lists filter rows
 

i've writen the code so that when i select an option from cell 'B5' it hides all rows except for those with 'dragline'. Same goes for selecting 'shovel' 'aux' or 'draglineNP'.

But i also have a drop down list in cell 'E5' that i want to work in the same way as above but with a different category, but after coping the same code underneath and changing the categories i get

compile error:
ambiguous name detected: worksheet_Change

so i don't know how to word it to run multples of this kind of function in the one worksheet and then i have a couple more drop down list so i'd like to know how i go about it

Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Cells.Count 1 Then Exit Sub
If Target.Address < "$B$5" Then Exit Sub
Application.EnableEvents = False
If Target.Value = "" Then
Range("7:90").EntireRow.Hidden = False
Range("91:186").EntireRow.Hidden = False
End If
If Target.Value = "Dragline" Then
Range("7:90").EntireRow.Hidden = False
Range("91:186").EntireRow.Hidden = True
End If
If Target.Value = "Shovel" Then
Range("91:141").EntireRow.Hidden = False
Range("7:90,142:186").EntireRow.Hidden = True
End If
If Target.Value = "Aux" Then
Range("142:162").EntireRow.Hidden = False
Range("7:141,163:186").EntireRow.Hidden = True
End If
If Target.Value = "DraglineNP" Then
Range("163:186").EntireRow.Hidden = False
Range("7:162").EntireRow.Hidden = True
End If
Application.EnableEvents = True
End Sub

Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Cells.Count 1 Then Exit Sub
If Target.Address < "$E$5" Then Exit Sub
Application.EnableEvents = False
If Target.Value = "" Then
Range("7:90").EntireRow.Hidden = False
Range("91:186").EntireRow.Hidden = False
End If
If Target.Value = "Unknown" Then
Range("7:10").EntireRow.Hidden = False
Range("11:186").EntireRow.Hidden = True
End If
If Target.Value = "Olex" Then
Range("11:20").EntireRow.Hidden = False
Range("7:10,21:186").EntireRow.Hidden = True
End If
If Target.Value = "Pirelli" Then
Range("21:30").EntireRow.Hidden = False
Range("7:20,31:186").EntireRow.Hidden = True
End If
If Target.Value = "Amercable" Then
Range("31:40").EntireRow.Hidden = False
Range("7:30,41:186").EntireRow.Hidden = True
End If
If Target.Value = "Prysmian" Then
Range("41:50").EntireRow.Hidden = False
Range("7:40,51:186").EntireRow.Hidden = True
End If
If Target.Value = "MM Cables" Then
Range("51:162").EntireRow.Hidden = False
Range("7:50").EntireRow.Hidden = True
End If
Application.EnableEvents = True
End Sub