Installation FreeBSD 5,1 release

[Gustavo Moreira]

Hello!  I do not obtain to install FreeBSD 5,1 in my system.  I follow the procedure of sysinstall, however, the following message occurs:  

"error mouting/dev/acd0 on/dist:  in such file or directory."  

Valley to detach that this error occurs with any type of device of data already I tried with CD, HD and floppy.  It forgives for the very bad english.  Necessary of aid.  Very obliged!  

Gustavo Moreira,  São Paulo - Brazil