by Luis de Vasconcelos.
For problem 1 first make sure that your Moodle and Moodledata directories are writeable by the web user. Often this problem is caused by insufficient permissions, especially to the Moodledata folder (which should be outside your web root).
Then try turning off the 'Use slash arguments' option under Site administration / Server / HTTP.
See the Images do not display on my moodle site discussion too...