[Can not get my magic box to load to the market page...My land is group but the store is mine..help]

i have done everything correctly ..I think.. my land is part  of a group.. items are set to group..but it sill will nt load to marked. I am renting this land... is the problem because I am renting and not owner?or is it some other issue?here is the address to my page... it loaded my banner and logo.. but iwll not load the items:   https://marketplace.secondlife.com/stores/94977

thank you!

[How do you change images to bring into sl for sale in marketplace?]

I have taken the photos...and now i need to find out what size they have to be to for use in both marketplaces as well as how to bring them into the game to use them...please help...I have not found a link for a tutorial. Also ....please...can magic box be used on land I am renting or do I have to have a premium account and use it from my land there?? Thank you for your help