Using umbrello do generate SQL code

Hello,
  I'm trying to use umbrello to build an entity-relationship model and then 
generate SQL code.  At first I tried to make an entity-relationship diagram, 
but it was really buggy (Attribute don't appear, but if you try to add them 
again it says they already exit) and it looks like code generation only works 
with classes.

  I did my entire diagram using classes.  Now I can export the code.  However, 
I don't get foreign key constraints.  I looked at the source code (version 
1.5.71) and in the file umbrello/codegenerators/sqlwriter.cpp, it's pretty 
obvious that umbrello is able to write such constraints.  Unfortunately, I 
can't figure out how to specify them in the GUI.  I tried to change the type 
of relationship between my classes (Aggregation and composition) to no avail.

  Did anyone figure out how to do it?

Thank you,
  Samuel Gilbert

-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems?  Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >>  http://get.splunk.com/