I hadn’t realised that the Eboostr Ram cache seemed to sit on top of my Ram disk. This surprised me as I thought that Windows (XP Pro SP3) would stop this happening. The Ram disk ceased to exist. I uninstalled the Ram disk and installed it again hoping that the Eboostr Ram cache would get created first and the Ram disk second with the Ram disk being allocated Ram other than that used by Eboostr cache.

This strategy works.