TI7 Recovery Manager Problems

I am running TI7, build 634. System specs: Asus P4C800-E Deluxe MB, P4 3.4 CPU, 2 x 512 OCZ PC3500EB memory; XP Pro SP2. I have used TI for several months with no problems, but recently Recovery Manager is not working properly, both when I use F11 or the bootable CD. TI will load, but when I select a task, eg., create image or restore image, it hangs during the processing phase. It is a complete freeze and I have to turn the computer off. I have tried creating a new CD, uninstalled and reinstalled TI, updated to Build 634. None of these have had any effect on the problem. I can still create and restore images from Windows, but that won't work if I have to restore the OS partition. Any suggestions?