Nintendo DS Browser Help.

I've downloaded the software and transfer it into my nds.
When I open the program, after saving, a message shows and says i need to insert a memory expansion.
Any help with this?

Yeah, you need a memory expansion, when you buy the Nintendo DS Browser you get a memory card which you inserts into the GBA slot. It cannot run without this.However, some slot 2 cards have the ability to act as a memory card too.

You can buy the RAM expansion from the Nintendo website or buy the real game itself (other than download) and you'll have fun browsing it.