Inventory Names returning empty

I am using the following function to list the textures in a prim's inventory. For some reason, llGetInventoryName is returning an empty string for some textures.

listTextures()
{
integer max = llGetInventoryNumber(INVENTORY_TEXTURE);
integer i = 0;
for (i = 0; i < max; i++)
{
llOwnerSay((string)i + ":" + llGetInventoryName(i, INVENTORY_TEXTURE));
}
}

Any advice?

(And how do I include code properly in this forum?)

Your type and number arguments are backwards in llGetInventoryName.

There's no real way to show code here. Some people have GreaseMonkey scripts to view it, so at least put it in

 or 
CODE
 tags.

D'oh!

Thanks.