kingdom hearts Chain of Memories not working

whenever i try to open it it comes up with this weird little error box and when i click ok something differnent pops up everytime.can anyone help me?

What are you playing it on, GBA emulator or flashcart? Which one? What does the box say?

sorry i forgot to put what was in the box.i was using vba and the box said"unknown opcode 4400 from (then some random code...eg. 0203d92d)edit: also im pretty sure that this is an older version of the vba

Are you using the 1.8 Beta 3? If you are, try using an older version, or try using VBA-M (google).

when i said old i meant really old...its 0.8... :-[

Okay, then update :)

which one should i download...the 1.8 beta3?

Yeah, and then if that doesn't work, keep going down a version.