HELP!! debugger broken

This is really killing me!!!!

I reinstalled everything below from scratch

Linux Puppy 3.00
Ruby 1.8.6
Rails 2.0.2
ruby-debug 0.10.0
mongrel 1.1.3
mysql 5.0

added "debugger" to a line in a controllor

started mongrel
brought up web page in firefox that would call the function in the
controllor that has debugger in it. The browser hangs indicating it has
hit a breakpoint

the console then displays

@drillerschoice = "choice"

which is right after the line with "debugger"

I get no (rdb:xx) debugger prompt and if I press any key I get a
message that mongrel has stopped.

in the development log

Processing DrillerController#index (for at 2008-02-02
13:59:34) [GET]
  Session ID: fc1bf7ce7ba6669f9570a9812302d4dc
  Parameters: {"action"=>"index", "controller"=>"driller"}
  SQL (0.000189) SET SQL_AUTO_IS_NULL=0
  Driller Columns (0.001163) SHOW FIELDS FROM `drillers`
Processing DrillerController#index (for at 2008-02-02
14:06:08) [GET]
  Session ID: 05bdd2c0a0e7d34913a48d0195c4412a
  Parameters: {"action"=>"index", "controller"=>"driller"}

nothing in the log to indicate a problem?

It looks like I need to debug mongrel or debugger but not sure how..