Dear khamis,
the required points for the full points in IELTS is:
Listening 7.5
Reading 6.5
Speaking 6.5
Writing 6.5
I dont know what you already tried but did you try:
http://www.scottsenglish.com/ielts/it is a website which profide you tests to practise. For me they were very helpfull.
Good luck!