Spiderman-21

Hi, Friends! I'm a german PC User ( Win XP Prof with SP 2, AMD Athlon 1,8 Ghz, 1 GB RAM, Avast Home Edition, CCleaner Version v2.03.532 in german). While using the CCleaner, i see, that some cookies will not delete. In Options "Cookies" are activated. And after running CCleaner, i restart my computer. What must I do, that all the cookies will delete ? Thanks for Help ! Spiderman.