i agree, its gotta be something like firewall/UAC/virus scanner messing with the network connection from it etc, you do have windows 7, disable em, restart, see what happens
aha, that fixes it. I'm running Microsoft Security Essentials on both PCs, so i doubt that's the cause. Same user name and pw so i doubt that's it. What am i missing?
well if it didnt work id said something is wrong with your MP/Database etc, since it does work locallly, to me it really seems like a network issue with that pc and the server, since you said it works for your other PCs,
firewall/virus scanner/something along those lines
Id uninstall Microsoft S.E. from client and server both pcs to be sure 100% its not that
OMFG, I fixed it. I re-read your post above,and I thought I had had UAC completely off, but it was just on the setting before bottom. I disabled it, restarted and now I can get in. The crazy thing is that I could get in to the MP-TVSeries Config directly, but just having it installed was making the plugins panel crash the MP-Config screen. So weird, but resolved.