Can't activate XP on this laptop..

Hello, I recently purchased an Everex- Stepnote 1510. Since then I have discovered that the Operating system (Windows XP) wasn't activated on the system. Now the sticker that has the activation code is on the bottom of the laptop, however, XP says it is in-correct. Windows is now not working as I wasn't able to activate it within the time-frame required.

After doing some more research on this I have found that Everex isn't around any longer, so I can't go to the manufacturer. Does anyone have any ideas/Suggestions/Help of any kind for this problem? :4-dontkno

I don't have any of the disks for this machine, indeed, the guy I bought it from told me many things that proved to be lies...:4-thatsba

Help is appreciated, and thanks for your time!