Using a 4GB Patriot SDHC One... Works perfectly? Have you tried using the AceKard firmware? Not AKAIO?
And if it doesn't work... Try using the latest AKAIO, and if that is what you are using, downgrade your AKAIO?
If it is still not working, but you can read your SDHC Card, then might as well try... Getting another one, and using this as storage xD