Pokemon Diamond save probs?

[nightsky98]

I am using no$gba and I spends 3 hours playing the game when I saved and exited. When I got got back on I got this error on the screen.

A communication error has occurred.

If you were in the Union Room, you will be returned there.
In all other cases, you will be returned to wherever you last
saved.
Please press the A Button.

I click the a button and everything goes white and there is no sound.
My save setting is Flash256KB and when I deleted this last save and saved again on Flash512KB I got the same error...

[azoreseuropa]

Set it to FLASH 512kbytes is correct but you have to change it then go to "File" and click "Reset Cartridge". You must have no$gba 2.5 and it did work. I don't play it because I am not fan of pokemon but it did work.

[nightsky98]

Thx it works now.

[azoreseuropa]

No problem.