Cannot move users from one DB to Another

we run exchange 2010 sp3 any time i try to move users from one DB to another it failed and only two users are moved the rest will fail with this error

Error: MapiExceptionNoAccess: Unable to open message store. (hr=0x80070005, ec=-2147024891)

Diagnostic context:

    Lid: 18969   EcDoRpcExt2 called [length=196]

    Lid: 27161   EcDoRpcExt2 returned [ec=0x80070005][length=202][latency=0]

    Lid: 32881   StoreEc: 0x80070005

    Lid: 50035 

    Lid: 64625   StoreEc: 0x80070005

    Lid: 1494    ---- Remote Context Beg ----

    Lid: 26426   ROP: ropLogon [254]

    Lid: 56503 

    Lid: 12716   StoreEc: 0x80070005

    Lid: 20794 

    Lid: 28474   StoreEc: 0x80070005

    Lid: 22330   dwParam: 0x0        Msg: 14.03.0123.002:FIRS-HQ-MBX-04

    Lid: 1750    ---- Remote Context End ----

    Lid: 23354   StoreEc: 0x80070005

    Lid: 25913 

    Lid: 21817   ROP Failure: 0x80070005

    Lid: 26297 

    Lid: 16585   StoreEc: 0x80070005

    Lid: 32441 

    Lid: 1706    StoreEc: 0x80070005

    Lid: 24761 

    Lid: 20665   StoreEc: 0x80070005

    Lid: 25785 

    Lid: 29881   StoreEc: 0x80070005

any help to solve the problem

thanks 

jibmud