Problem with mail from woocomerce

I have a problem with my moowoodle instalation.
I have only one couse, i update it from my moodle to woocomerce correctly and when i buy it i receive the mail from woocomerce to get acces to my moodle and in may moodle i have a new user in my course, the problem is that the mail i receive doesnt have link to chage my password. It has this message:

Username : *Username*

Password : *1Password*

To enroll and access your course please click on the course link given below :
To access your course activity=”0″]Dharma yoga[/moowoodle]
You need to change your password after first login.

why i have this problem?.

thanks for the help, this pluguin is very interesting and prob i will buy the auto enrolment it seem veri interenting to the users