Clearing Cached Items On My Network Places - Windows Xp

So i've been sharing files between Windows XP machines for sometime now (and sometimes with Linux) and i notice that when i go to My Network Places (on XP) even if i'm not connected to the network, the cached items (shared folders) of networked machines are still thereand they tend to exist for quite sometime before they are removed... is there a way of making this Windows Share update itself a lot more sooner and clearing out cached items?It's been days since i accessed My Network Places on my laptop and i'm trying to access some shared folders on my Kubuntu Machine (locally) but there isn't any shared folders on display other than days/weeks old folders shared from my Windows 7 machine which isn't on the network