Exchange 2007 event id 1008 MSExchange ActiveSync &

[eemies]

I install Exchnage 2007 AllinONe role on server 2008 with DC server 2003
every thing is fine i had issue in active sync when i configure device it
cannot syn and give below error please me.
Thanks

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Product: Exchange
ID: 1008
Source: MSExchange ActiveSync
Version: 8.0
Symbolic Name: AirSyncException
Message: An exception occurred and was handled by Exchange ActiveSync. This
may have been caused by an outdated or corrupted Exchange ActiveSync device
partnership. This can occur if a user tries to modify the same item from
multiple computers. If this is the case, Exchange ActiveSync will re-create
the partnership with the device. Items will be updated at the next
synchronization.

URL=/Microsoft-Server-ActiveSync/default.eas?Cmd=Provision&DeviceId=BAD73E6E02156460E800185977C03182&DeviceType=PocketPC

--- Exception start ---

Exception type: System.Xml.XmlException

Exception message: Invalid character in the given encoding. Line 79,
position 2.

Exception level: 0

Exception stack trace: at System.Xml.XmlTextReaderImpl.Throw(Exception e)

at System.Xml.XmlTextReaderImpl.InvalidCharRecovery(Int32& bytesCount,
Int32& charsCount)

at System.Xml.XmlTextReaderImpl.GetChars(Int32 maxCharsCount)

at System.Xml.XmlTextReaderImpl.ReadData()

at System.Xml.XmlTextReaderImpl.ParseText(Int32& startPos, Int32& endPos,
Int32& outOrChars)

at System.Xml.XmlTextReaderImpl.ParseText()

at System.Xml.XmlTextReaderImpl.ParseElementContent()

at System.Xml.Schema.Parser.Parse(XmlReader reader, String targetNamespace)

at System.Xml.Schema.XmlSchemaSet.ParseSchema(String targetNamespace,
XmlReader reader)

at System.Xml.Schema.XmlSchemaSet.Add(String targetNamespace, String
schemaUri)

at Microsoft.Exchange.AirSync.Validator.CreateSchemaSet(Int32 idx,
DirectoryInfo dir)

at Microsoft.Exchange.AirSync.Validator.CreateSchemaSet()

at Microsoft.Exchange.AirSync.Validator.ValidateXmlNode(XmlDocument xdoc,
XmlNode xmlNode, String targetNamespace)

at Microsoft.Exchange.AirSync.Validator.ValidateXml(XmlDocument xdoc, String
rootNodeName)

at Microsoft.Exchange.AirSync.ProvisionCommand.Execute()

at Microsoft.Exchange.AirSync.Command.WorkerThread()

--- Exception end ---.

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please help
thanks
Imran