SSO Login Problem & Structure Doubt

I've found that Joomdle's SSO feature is so great, but I've encountered with the following problem:

when I logged in joomla I can't loged in moodle automatically.


the other functions works well for me.
In health check everthing is green.
the logged out function works well, in both joomla and moodle
when I logged in moolde, the system could help me login in joomla automatically, while it's not working that well the opposite way

I'm using the latest version with some modification.
moodle 2.2
joomla 1.7
joomdle-0.6-for-joomla16-alpha8

And I really hope to know the structure of the joomla and moodle
I build the moodle and joomla tables in the same database,which did't show in the installation instructions.
questions following:
1. should I put them in the same folder, where moodle will be the sub folder of joomla?
2. or should I make both temp folder the same one?

Appreciate your help, thank you

creating a new user in Joomla, and it gets created in Moodle.

after I forward to log in in moodle while I've logged in Joomla

it gives me the hint
"Your session has timed out. Please login again."

Hi.

If your system check is all ok, check that you are not chaging domains (ie:goind to www.site.com and being redirected to site.com).

the same domain name.
Joomla: www.mycourses.us/joomla/
and
Moodle: www.mycourses.us/moodle/
Testing account:wT
Pwd:Test12345,

Really need your help, thank you

@antonio, thank you for replying and some thing else for you
I firstly doubt that something wrong with the communication between Joola and Moodle, but after logging in, I changed the password in Joomla and found that I kept logging in in Moodle...so is this a hint for you.