Can't log in "Either you have the wrong username & password"

[Wilson Logan]

No.   Yahoo has switched the groups data display service off (and by now they've probably deleted the actual groups data).

You need to get either a PG4 archive of your group(s) to load into PGO or a Yahoo archive of the group which also can be loaded into PGO.

Cheers,

Wilson.

[ITechGeek]

Can I still obtain an archive of the group?  If so, how?

[Wilson Logan]

You would need to approach a group member who has either:

a) Downloaded the group with PGO

b) Downloaded the MBOX format archive which was offered by Yahoo for a limited period after they deleted the group data.