How to use cscope-database-regexps

am using emacs 24.3 with xcscope. I need help in setting cscope-database-regexps. I am trying to setup so that it will look for code in this order

/home/mike/Src/master1/child1/child1
/home/mike/Src/master2/child2/child2
/home/mike/Src/master1
/home/mike/Src/master2

So in .emacs I did the following, but it does not work. I don't see cscope.out get created in each of the directories I listed above.

I put /home/mike/Src/master1/child1/child1 and /home/mike/Src/master2/child2/child2 since they are my primary area of my work. If a search is not found that, I want to expand to the rest of the tree. Hence I have my priorities. I want to know how can I do that with xcscope.

Thank you.

(setq cscope-database-regexps
'(
( "^/home/mike/Src/master1/child1/child1"
t
)
( "^/home/mike/Src/master1//"
t
)
( "^/home/mike/Src/master2/child2/child2"
t
)
( "^/home/mike/Src/master2/"
t
)
)
)

Start by reading the cscope-database-regexps handling in xcscope.el and reproduce the reported configuration with Emacs 24.3. Verify how the listed paths and regexes are interpreted, then document or test the behavior so the requested search order and cscope.out generation have a clear result.