I think it has to do with RAM page access being slightly different on newer TI-84+SE calcs. If you're gonna buy one from ebay, you should ask the seller first what's the letter at the end of the serial number, to make sure.

Also the TI-Nspire 84+ mode is pretty much a TI-84+ emulator. Emulation is not 100% perfect. Running another emulator inside that emulator is a challenge.

http://ourl.ca/3302/66915

This lists all versions that works, might/might not work or will not work. I think I'll copy this post in a lonely thread, which Calc84 can edit when needed, as reference.

Before buying a new calc on Ebay, message the seller and ask him for that letter. You cannot do this at a store, though. At a store it's most likely new stock anyway.

Can you help me? It's my first time here so I'm not a calculator genius, But I have a some what knowledge of calculators. Ok, so I have a TI-84 Plus graphing calculator. I've converted my .gb file so it's now .8xk. When I try to transfer to my calculator, it says that I don'
t have enough memory to continue, even though I wiped out all my RAM . I've gone to 2ND - Mem- And 7. Reset, Then reset all. Btw, I got my calculator like over the summer so I'm not sure if it's because it's a newer model.

Yeah, but the problem is that I can't get it onto my calculator , You are lucky enough to even get it on yours T.T

a .8xk is an application, which resides in your calculator's archive. You don't have enough archive space (2nd - Mem - 2, look at ARC FREE) for the file so you'll have to delete some applications off of it.

Game files are incredibly huge so you'll have to clear a lot of space off for them. It's even possible, being a regular 84+, that you don't even HAVE enough space for certain games 

I have 24317 RAM Free and 491520 ARC Free , If that is not enough, is there a possible way I can shorten the .gb file?

Well the file is 2.48 mb 2,603,195 bytes. xP, I think that's too much .

idk.. I've manage to fit Pokemon on just that i can't execute it on the calculator....

Ah, Pokemon Red. Good game. Sadly, according to TI's site specs, the Silver Edition only has about half that in Archive space (about 1.5 MB) so that's still a no-go.

However, if you're willing to wait an indefinite amount of time, our good pal tifreak8x is working on his own BASIC-with-some-ASM port of the first generation Pokemon games called "Pokemon Purple".

Check it out:
http://ourl.ca/2766
http://cemetech.net/forum/viewtopic.php?t=3387
(Those are two of the however many threads I know of off the top of my head)