Starcraft Battle.net Doesnt Work for me!

[Lockheed2266]

Okay, so i purchased my copy of starcraft on ebay last week. I keep trying to go online to battle.net. i get that error when i select "battle.net" and then click "US East" then click OK

I get this error

"The CD key used to install this application was intented for another product. Please reinstall this application using the correct CD key."

Well, i think i just got ripped off $9 on ebay for this game, or something is wrong. Has anyone else got this error?

Thank you

PS. Here is a pic of the error

[otogrim]

That could actually mean 1 of two things. Either you got ripped off on e-*** or you put in the CD-Key incorrectly. Try re-installing the game and make sure you have the CD-Key right and then double check again. If it still doesn't work then you my friend have been gyped.