Error message when you try to start the Microsoft BizTalk RFID service in BizTalk Server 2006 R2: "Could not start the Microsoft BizTalk RFID service on Local Computer"

Could not start the Microsoft BizTalk RFID service on Local Computer.
Error 1067: The process terminated unexpectedly.

Error Details:

Event Type: Error
Event Source: MSBizTalkRFID
Event Category: Server Manager
Event ID: 1500
Description:
The Microsoft BizTalk RFID service failed to start: Could not load type 'MS.Internal.Rfid.Service.ResourceInfo' from assembly 'RfidServices, Version=3.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Resolve the issue that is causing the exception, and then restart the BizTalk RFID service.

4| Fatal|091207 22:43:15|System.TypeLoadException: Could not load type 'MS.Internal.Rfid.Service.ResourceInfo'
from assembly 'RfidServices, Version=3.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
at ReadKeyValueOfintTreeOfResourceInfoXgw7Ek0wlkDw_Sf_SqFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
at System.Runtime.Serialization.ClassDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
at ReadArrayOfKeyValueOfintTreeOfResourceInfoXgw7Ek0wlkDw_Sf_SqFromXml(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString , XmlDictionaryString , CollectionDataContract )
at System.Runtime.Serialization.CollectionDataContract.ReadXmlValue(XmlReaderDelegator xmlReader, XmlObjectSerializerReadContext context)
at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract dataContract, XmlReaderDelegator reader)
at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, DataContract& dataContract)
at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, String name, String ns)
at System.Runtime.Serialization.DataContractSerializer.InternalReadObject(XmlReaderDelegator xmlReader, Boolean verifyObjectName)
at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator reader, Boolean verifyObjectName)
at System.Runtime.Serialization.DataContractSerializer.ReadObject(XmlReader reader)
at Microsoft.SensorServices.Rfid.Utilities.RfidCommon.DeserializeFromXmlDataContract(String xml, Type typeToDeserializeInto)
at MS.Internal.Rfid.Service.Utilities.DatabaseUtilities.Load(String key, Type typeOfValue)
at MS.Internal.Rfid.Service.TreeResourceManager.LoadConfig()
at MS.Internal.Rfid.Service.TreeResourceManager.Startup(IDictionary interfaceDictionary, RfidServerConfiguration config)
at MS.Internal.Rfid.Service.ServerManager.StartAllComponents()|[MSBizTalkRFID] 4| Info|091207 22:43:15|Server shutting down|[MSBizTalkRFID]