I have been running an application for several years. Now the program hangs randomly. Must do CTL-ALT-DEL and stop program. When I run RESMAN, it hangs at 1 second clearing "SYSFAIL". Only way to clear is restart computer. Have swapped PCI card, slot 0 card, cable, backplane, HP1333A, reloaded program, scanned hard drive (no errors). What am I missing?