ok those errors are that of a Bad or corrupt Installation. You need to make sure that when you install Mirc WRITE down what directory your installing to MAKE it C:\Whatever
Then once your Mirc is Installed DONOT run it until AFTER you have Installed Invision to the SAME directory C:\Whatever
Also you can use the pack I have Made for you
http://65.32.1.161/madeasy/Invision.rar all u have to do with this one is Un rar to C:\Whatever
DONT Import Settings at all what so ever, Dont Copy your settings Folder into the New Setup
On another Note you will have to set the setting from scartch for each network you connect too, Also with the new install watch if your on a server that splits alot your settings will be lost.
One Final Note U cannot connect to the same network more then once If you do this your settings will corrupt and you will have to remove them and possible reinstall. Use separate scripts if you want to connect to the same network more then once.