load balancing problems

hi ..

i am using mod_backhand to load balance a server cluster.
somehow it does not really balance the load of the servers.

my rules are ...

<Directory /www/htdocs>
Backhand removeSelf
Backhand byAge
Backhand byLoad
Backhand byRandom
# Backhand byBusyChildren
</Directory>

i am using one apache front server and 4 apache backhand servers.
three backhand servers have almost the same hardware. the 4th server
has the slowest hardware. this server gets a real high load a lot of
times. so the rule "by Load" does not seam to work.

as a work around i would like to reduce the max amount of clients on
this slow machine. does anybody know if the frontserver will recognize
if the max. amount of clients is reached on a backhanded server and
will not forward any requests to this server till there is a new client
available.

thx.

frank