a few people have got blocked using the busy blocker script..
they refuse to get unbloced..
and now when i block them manually.. then also they dontunblock
what could be the problem????

try disableing the script...
(prefferences -> scripts -> remove the tick before the script and choose ok...)
if that doesn't help it's probably not the script...

doesnt help

Could you explain a bit more what you mean by "refuse to get unblocked"? 

I noticed a couple of times when I wrote the script that although contacts appeared to be unblocked to me, I still showed up offline for them. It doesn't happen anymore, so I assume it was a server problem.

Have you tried fully exiting WLM (right click tray icon>exit) and then re-opening it and signing in? That usually solved it for me.

well i guess it isnt a problem wid the script cause i disabled it and it stil dint work..
btw i mean that i cant unblock them.. i tried exitting wlm too..

try reinstalling wlm itself