I suspect that you have the same issue reported here with the newer HTC devices:
http://social.microsoft.com/Forums/en-US/LiveMeshMobile/thread/68a60806-e55e-44bf-99d0-f20f23e87264You will need to await an updated Live Mesh mobile client. I suspect that we won't see an update until some time in the 1st half of 2010, though.
-steve
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