5.2.1-RC floppy install: many if_X.ko modules failed to load

Hello.

When I boot from the installation floppies of 5.2.1-RC, at the beginning 
of sysinstall is starting I get a window on the blue background with 
following error message on it:

Loading module if_pcn.ko failed
AMD Am79c79x PCI ethernet card

then next window with the same error message:

Loading module if_vr.ko failed
VIA VT3043/VT86C100A Rhide PCI ethernet card

and so on about if_ste.ko, if_xl.ko, if_ed.ko, if_bge.ko, if_re.ko, 
if_wb.ko, if_rl.ko, if_sis.ko, if_dc.ko, if_bfe.ko, if_aue.ko, if_fxp.ko 
and if_sf.ko modules.

Previously I successfully installed FreeBSD 5.2-RELEASE from its the 
floppies. Now, when I'm trying to install FreeBSD 5.2.1-RC by the same 
way, I'm geting the above error messages, so I'm forbearing to continue 
this installation. This problem is always repeatable, even after I made 
the floppies on different diskettes. This system doesn't have any AMD or 
VIA chip on it.