PQconnectdb SSL (sslmode)

hi,
I am not sure if this is a bug.

My PG_HBA.CONF
----------------------------
local all all trust
host all all 127.0.0.1 255.255.255.255 trust
host all all 192.168.0.0/16 trust
hostssl dbm all 192.168.200.201 255.255.255.255 md5

int ret=PQconnectdb("hostaddr=192.168.200.10 dbname=dbm user=postgres
sslmode=prefer");

' ret' prints -1.

Now when I change the above function to one with sslmode=allow, the
connection is established and query runs.

I do have (ssl=true) in postgresql.conf and have tested the
certificates and they are working right. I also restart the postmaster
after every change in postgresql.conf and pg_hba.conf.

I would prefer the connections are SSL and hence would like to use the
default "prefer" sslmode.

vish