Unfortunately I've already been through that article amongst others. RegMon traces don't show any signs of problems (or rather, nothing that I recognise as a problem).

In replying to another poster with an OLE problem I realised I should be taking my own advice, and tried the same operation with a VBS script:

set sametime = CreateObject("STComTk.CommunityService")
sametime.LoginByPassword "Server", "User", "Password"
[download]

Same problem occurs:

C:\usr\VBS\sametime.vbs(6, 1) (null): Library not registered.

So it looks like there's something wrong with the Lotus Sametime COM objects rather than Perl...

Cheers

Gordon