Yesterday wood r4 firmware has been updated to V1.40, see post here:Wood r4 firmware updated to V1.40 as we know that r4i gold 3ds (r4ids.cn) uses the wood firmware, today they also have updated their firmware from V1.39 to V1.40, usually the r4i gold can work on the new 3DS firmware V2.2.0-4 with the V1.40 firmware, but some old r4i gold may have problem, so they also released the update patch for old r4i gold card to make it support 3DS V2.2.0-4, let's take a look.
Changelog of Wood R4 V1.40
-'beyblade - metal masters (usa)' fixed
-'phineas and ferb - 2 disney games (europe)' fixed
-'fossil fighters champions (usa)' fixed
you can download it from here: wood r4 V1.40
And also can download the update patch from here if your r4i gold still can not work on 3DS with V1.40: update patch
There is a read me file in the patch, just follow the update steps, you wont miss it.
By the way, the r4i gold 3ds has changed the package to a Christmas version, here is the package.