hmm, if you are using a winsock control to connect the two programs that could be a problem with noobs, thinking theres a trojan running.
does your friend have the vb runtimes, you'll need them for (i havent downloaded your plugin btw) but if you have an actualy exe file that the lnk files call with paramaters, that exe with require the vb runtimes.
have you registered your plus dll because its coded in vb you need to register it. also if you are using the code
code:
Private WithEvents oMessenger As Messenger.MessengerAPI
then you'll need the latest version of Windows Messenger aswell.
good luck _b