How do I clear the cache when using memcache?

Hi, I have recently installed cacherouter along with memcache to replace Drupal's database caching as I had identified this as one of our performance bottlenecks. However, I seem to be having as issue clearing the cache. I tried clearing the cache using the 'Flush all caches' option from the administration menu, as I always have done. However, it didn't seem to clear the cache and anonymous users were still seeing cached content. The only way I could clear it was to manually flush mamcache's cache (by using the memcache.php script that came with memcache).

I was under the impression that cacherouter literally replaces the original drupal caching mechinism, and therefore I would be able to clear it in the same way I always had done. Was I wrong? Is there any way to clear the memcache through Drupal?