proftp error during make

Hi all,

I am trying to setup ProFTP 1.2.10 on RedHat Linux machine.

I run the configure script : ./configure --with-modules=mod_tls
mod_tls is used because I need secure FTP.

Next, I execute 'make' and it breaks down with the following error:

make[1]: Entering directory `/root/proftpd-1.2.10/modules'
gcc -DLINUX -I.. -I../include -O2 -Wall -c mod_tls.c
In file included from /usr/include/openssl/ssl.h:179,
from mod_tls.c:40:
/usr/include/openssl/kssl.h:134: parse error before '*' token
/usr/include/openssl/kssl.h:147: parse error before '*' token
/usr/include/openssl/kssl.h:148: parse error before '*' token
/usr/include/openssl/kssl.h:149: parse error before '*' token
/usr/include/openssl/kssl.h:149: parse error before '*' token
/usr/include/openssl/kssl.h:150: parse error before '*' token
/usr/include/openssl/kssl.h:151: parse error before '*' token
/usr/include/openssl/kssl.h:153: parse error before '*' token
/usr/include/openssl/kssl.h:155: parse error before '*' token
/usr/include/openssl/kssl.h:157: parse error before '*' token
/usr/include/openssl/kssl.h:165: parse error before '*' token
In file included from mod_tls.c:40:
/usr/include/openssl/ssl.h:909: parse error before "KSSL_CTX"
/usr/include/openssl/ssl.h:931: parse error before '}' token
make[1]: *** [mod_tls.o] Error 1
make[1]: Leaving directory `/root/proftpd-1.2.10/modules'
make: *** [modules] Error 2

There seems to be some problem with the SSL code.
Now when I run the configure script without including any module, the
'make' runs correctly.

I execute 'make distclean' before executing the configure script again.

Can anyone please tell me what to do?
Thanking you all in advance.

-Arvind