[pptp-server] Installing PoPToP; missing files?

[Al Ludwig]

In file included from ppp_mppe.c:67:
rc4_enc.c:60: rc4_locl.h: No such file or directory
make[1]: *** [ppp_mppe.o] Error 1
make[1]: Leaving directory `/usr/src/linux-2.2.14/drivers/net'
make: *** [_mod_drivers/net] Error 2

This is an except from "make modules" and below is the error from trying to
insert the mppe module:

[root at LNX linux]# insmod ppp_mppe
insmod: ppp_mppe: no module by that name found

Can anyone tell me where to get ppp_mppe.o?  And if anyone can tell me where
to find it; where do I put it?

Thanks,

AL

PS:  I'm using ppp-2.3.8 w/ SSLeay-0.9.0b, I was trying to duplicate the
HOWTO versions of software exactly since I've been unsuccessful at making
this work.