无法加载DLL'sybdrvado11.dll'：访问被拒绝

Question

我一直坚持这个很长一段时间，我已经让所有人和所有iis用户都可以访问但是没有运气

     6/26/2014 4:24:47 PM: System.TypeInitializationException: The type initializer for 'Sybase.Data.AseClient.AseConnection' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'sybdrvado11.dll': Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
   at Sybase.Data.AseClient.Unmanaged.AseGetDriverVersion(StringBuilder value, Int32 capacity)
   at Sybase.Data.AseClient.AseConnection.CheckVersion()
   at Sybase.Data.AseClient.AseConnection..cctor()
   --- End of inner exception stack trace ---
   at Sybase.Data.AseClient.AseConnection..ctor(String connectionString)
   at Common.oleds(String SqlString, String constring)
6/26/2014 4:24:47 PM: System.InvalidOperationException: Nullable object must have a value.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Nullable`1.get_Value()
   at Operation_FXPurchase.validate_account()