why i am getting ProtoBuf.UnexpectedEnumException

[skcr]

i have enum like

<ProtoContract()> _
Public Enum varenums
<ProtoMember(1)> _
varenum1
<ProtoMember(2)> _
varenum2
<ProtoMember(3)> _
varenum3
<ProtoMember(4)> _
varenum4
<ProtoMember(5)> _
varenum5
<ProtoMember(6)> _
varenum6
<ProtoMember(7)> _
varenum7
<ProtoMember(8)> _
varenum8
<ProtoMember(9)> _
varenum9
<ProtoMember(10)> _
varenum10
<ProtoMember(11)> _
varenum11
<ProtoMember(12)> _
varenum12
<ProtoMember(13)> _
varenum13
<ProtoMember(14)> _
varenum14

End Enum

it Serialize fine like this
Using m As New MemoryStream()
Serializer.Serialize(m, msg)
Return m.ToArray()
End Using

but when i deSerialize it it always throw a exception
ProtoBuf.UnexpectedEnumException on ProtoMember(13) which is
varenum13

it works fine for others

i tried changing the name of enum but still i get the exception