Getting 32-bit Linux programs working on 64-bit Linux distributions can 
be tricky. You may want to search the web for "ia32-libs".

Here is Byeong-taek Lee's technique for running Kylix applications (like 
MRIcro) on Gentoo 64-bit distributions (and potentially other Debian 
based 64-bit distributions that store 32-bit libraries in /usr/lib32/ 
instead of /usr/lib/). These modifications are not required for 64-bit 
distributons that store 32-bit libraries in /usr/lib (e.g. SUSE and 
Fedora).

First, install emulation library. At least, emul-linux-x86-baselibs and
emul-linux-x86-xlibs must be installed. For more details, see
 http://www.gentoo.org/proj/en/base/amd64/technotes.xml?part=2&chap=4

Second, copy following batch file and check if the batch file has proper
permission (755).

------------- cut here ---------------------
#!/bin/bash
export LD_LIBRARY_PATH=$HOME/pgm/mricro
export GCONV_PATH=/usr/lib32/gconv
LANG="ISO8859-1" $HOME/pgm/startmricro $1
#$HOME/pgm/startmricro $1 > /dev/null 2>&1
------------- cut here ----------------------

Actually, now i commented out the third line (export
GCONV_PATH=/usr/lib32/gconv').
But, if somebody use older emul-libs, he should need the line.
In older emul-libs, the line was critical for running mricro in my
experience.
My current emul-libs version is newest and I don't need it any more.
With or without the line, mricro works well on my computer.

A second problem with running Kylix applications (like MRIcro) on these 
distributions is that the fonts in the menus and on the forms can 
appear very small. 

For the font problem, i use sometimes the fourth line or othertimes
fifth line to avoid the problem.
Both line have a strengthness and a weakness.
When I take a fourth line, the font on the menubar is a little big.
Otherwise I take a fifth line, mricro produces numerous font warning.
So I added " > /dev/null 2>&1" in order to prevent the warning from
generating on screen. But this method makes launching slower.