[How can I open and wear my bought items in game from webiste?]

Hello?

I have big problem.

I bought many times to try and wear for me on Market SL of website.

I thought I can open and wear in game as soon as  I login after buying items?

But I can't.  When I click on the box  in my object folder, It's said something msges.

But I cant understand it?

Maybe it means I need something first to wear my items?

Please help me?

What can I do to wear my items in game?

Why I can't open and wear them after buying times?