hook_scheme doesn't work Possible Duplicate:
  hook_schema is not creating database table  




I am developing a module in Drupal 7. It is called scorm. I created scorm.install file, where I wanted to create the necessary tables, when the module is being installed. For testing I used book module: I installed it and 'book' table was created.

So I took the code from book.install, renamed all the functions prefixes from 'book_' to 'scorm_' and tried to install my module. I added this code to scorm_schema function:

function scorm_schema() {
    print 123;exit;


And 123 was printed when installing. So I removed this test code, being sure, that the hook is called.

But the book table was not created! How can I debug and find out the cause of problem?
hook_schema() should return an array that defines a database schema.