update accelerator cache stats

Developers i am running a couple of ipfire systems, all with update accelerator running. one has an intermitant problem in that it does not always show the cache stats ie it has to be refreshed a few times before i get a result due to apparent timout. stats for the cache are efficiency index 16.4 files in cache 52383 cache size in bytes 377,796,514,550 below is my profile

http://fireinfo.ipfire.org/profile/691c7fd0343b899e011c1fe0ff107187c0af85d7

can you help me to find out why this is timing out rgds Ian