Make sure you have TexLive installed. Older TeTeX was recommended but according to Ubuntu repositories, TexLive is the new package to install.

How could I set it up ledgersmb to support SSL connection

I foresee problem here, password could be misused.

LedgerSMB failed to print to printer. I did the following changes in BP.pm, :-

#open( OUT, '>', $form->{OUT} ) or $form->error("$form->{OUT} : $!");
#by fhng
# 16/4/08
#--------
open( OUT, "|$form->{OUT} >/dev/null 2>&1") or $form->error("$form->{OUT} : $!");

Then, it print.

Also, the error message is not helpful, e.g. if LATEX is not installed, printing will fail with out much debug info but just display Error

Thanks.