HELP!! Installing New Items?

How can I add new icon's for my users to buy in the vbstore? I get an error message every time I try to put a new one on. Here is how I installed a new item.

AdminCP>VbPlaza>Add New Catagory>

Here I Set it for admin only to test, and verified that the image location is correct for the images I want to use.

Add Catagory>Save

Back to

AdminCP>vbPlaza>Add New Option>

Item Active - Yes
Can Always Change - No
Show In Store - Yes
Log History - Yes
Catagory Name - Set to my new catagory I just made
Set the items name
Set Items description
Display order - 500
flood check - 30
item cost - 1
item cost auto calculated - 1
tax - 0
expires - 0
Item quantity - 20
items sold - 0
override catagory permissions - no
Allowed user groups - admin/head admin
denied user groups - none
item location /shop-test/ (which is where im using to test)
item script location (nothing, no clue what this is)

Table says (Advanced Users Only!) so I did not touch this, I have no clue what any of this is, same with Input Field Settings, and Option Settings.

Now I go to my store and purchase it, and here is what happens.

Store Menu>(Added new catagory)Game Box Options>Click the image of the game box>**Get The Error Message** "The Store option you are trying to purchase has an invalid Set Name."

What am I doing wrong? Thanks Alot for all the help!

I am using 1.5.5 btw