PDP 11/23 Help

Greetings, I just picked up a PDP 11/23 in excellent condition from an accountant that was going to dispose of it. It has two RL02 drives and 10 disk packs. My background in DEC stuff is only VMS, so I checked around and found some info on booting the machine, which I did successfully.. once. I was able to get a directory listing and type a few files. The system has RT-11 v4.00 with a runtime package in Dibol for general ledger, etc. I halted the machine and tried to restart it again, only this time it complains. The display I'm getting is.. TESTING MEMORY 0124.KW START? Y 000010 @ I also tried 173000G at the @ prompt, and still get 000010. Is there something I'm doing wrong here? I've also been searching for a FAQ of some type on RT-11 and the 11/23. Found some stuff, but would be very interested if someone has a jewel URL they'd be willing to share. Like I said, the machine is in beautiful shape, been well cared for, one owner. I had to drive 5 hours one way to get it (Houston to Shreveport, LA), but was worth every mile. Any help would be greatly appreciated! Best regards, Mark Honeycutt Baytown, TX