Slava, try setting the global max texture size to the value below massive, this will set the Texture max load in your config. It defines the max size for textures which FS9 displays (256 x256, 512 x 512, 1024 x 1024). It is controlled by the global max texture size slider in the hardware settings in the sim with 1024 x 1024 corresponding to the "massive" setting. If this is indeed a memory problem it might be mitigated by a lower texture resolution. Downside is that airport and aircraft addons using hires textures will be less crisp.