Booting RSX-11M On A PDP-11/34

I have pretty much no experience with DEC systems, or at least PDP-11s anyway. I have an 11/34 with three RL01 drives (only two are connected). The system works fine, I get the register printout on the console LA120, and I can examine, deposite, etc. When I put the RSX-11M pack in the RL01 drive, and ready it, I don't get any fault ligtht or anything. When I get everything set up, I tell the system to boot from drive 0. The light on the drive flashes rapidly, and I can hear it spinning. Then I get a lot of line feeds on the console, along with a few seemingly random characters, usually lower case Rs, Ss, and Ms. So, if anyone can tell me what I am doing wrong, or what I need to be doing, I would greatly appreciate it. Thanks, Owen