edit:: oops, i just realised that the norton internet security has ad-blockers never occured to me to switch that off. cant try it now, tho, cos i asked my bro to help me open and use that invite…will try it when i get my next invite. thanks for the help, anyway
just a quick update in case someone runs into the same problem…i found the root of the problem after receiving my next few invites:
it was SP2’s built in popup blocker after all - had to add gmail.google.com to the safe list and it worked.