Need help with PDP-8/A, VTServer & PDP-11

A frustrating evening in vintage computer-land, as you will see. Also the drive belt popped off my 33ASR during the fun. And Windows Networking to the old PC I use to run VTserver was initially nonfunctional as usual, but I digress. I fired up my PDP-8/A after a long hiatus, and it won't boot OS/8 any more (on boot, the RL02 immediately flashes its Fault light briefly but then becomes ready again, and the system halts). The drive seems to be working without errors at least according to the short test programs from the user's guide I keyed in - I don't have a diagnostic pack - but reading the status register shows no error bits set, and the Oscillating Seek program also runs properly... Anyhow, I figure that the OS/8 pack might have become corrupted, so I attempted to reload it on my 11/23+ system (which IS working and passing memory tests) using VTserver, which is how I created it the first time. However, since I last successfully did it, I've upgraded the 11/23+ boot ROMs to the KDF11B-BH V1.0. This is the only hardware change. Not sure if that has anything to do with the problem, which is: When attempting to download the disk image, the copy portion of the program loads (starting at 140000) but won't execute, halting at 140002. I discovered that I had the Halt switch set. If the Halt switch is NOT set, when execution is supposed to begin, instead the 11/23+ says "ERR 4 MMU ABORT" and also won't accept the incoming disk image data! Do I need to go back to the original boot ROM in order to use VTserver (i.e. is there some change made to ODT that is messing things up?) Also, does anyone have a paper tape version of the RL02 diagnostics for PDP-8? thanks Charles