Try these fixes...
Right-click the Limewire icon and go to properties and change compatability setting to Windows 2000. (but only if you're using Windows 2000 or later.) Somebody reported changing to Windows NT compatibility fixed their problem despite not using that operating system version.

Right-click on the Limewire icon on the desktop and click on Run as. Then it should come up showing the current user and then switch it over to Administrator. (but 'only' if you're the admin of your comp.!)

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tried both of those already as well.
including deleting the limewire java before running after new install of limewire and java offline versions.

Well unfortunately that leaves me to believe that it's your ISP that is causing this...They are known to shape p2p and in your case it looks like they are...

Check out this thread.
[RANT] Mediacom blocking P2P traffic - Dont waste your money - dslreports.com

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But...try this last ditch effort...

Uninstall Limewire using the uninstaller which is found in start > all programs > limewire...then re-install it using the offline installer...To find the offline installer, use the link below > cancel the installer window when it pop's up and then select the offline installer link...
Lime Wire » Download LimeWire

Try installing PeerGuardian, it will help keep the fake hosts out...Remember to enable PG just before you start limewire up...
Phoenix Labs » PeerGuardian 2


Another thing if you are using limewire 4.13 and later you can apply this hostile list...
The TechNutopia Fullsize Hostiles List for BearShare and LimeWire

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I really don't know, it is weird tho that I had mediacom the whole time ( with my old comp and now with my new one) and everything was fine untill I upgraded to the new version of lw. Let me ask you this, I recintly had to do a complete system restore (15 year old son messed up my ge force 8200 driver and ALOT of other stuff on new comp) and after complete restore I then downloaded new version of lw, could my vista backups (on puter) be messing with lw , because I know vista has a little more intricate backups than xp.

ok I'll try that , but also I wanted to say thanks for all you're efforts you've really been trying to help me alot and believe me I really do appreciate it.

alright I tried the peer gaurdian and the hostil list and nothing worked.

well thank's for trying.

Very well could be the reason..I'm not a Vista user, so I really don't know alot about the system...
I reckon post what you have just said over at the limewire.org forums...A couple of the developers frequent there..They may know what's going on....
Bugs and Beta Testing - LimeWire Forums

Sorry I can't help more..

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If you dont live for something...
You die for nothing...