controller cannot see minimServer

[winxi]

Hi, i once had a UPnP related network issue (before using MinimServer). In my network, i've two D-LINK routers, whereby one of them is configured as access point. In both routers I had enabled the option 'UPnP', which seemed reasonable to me (although i don't really know what this option brings about).
This resulted in heavy data transfer between both these routers and in my control points some media servers appeared and disappeared in irregular intervals. Disabling the 'UPnP' option in both routers solved this problem for me.