K8018B 3rd plane not working

Hello,

I have soldered the 5x5x5 led cube.
Everything is working just fine except that on the third plane there is not one led working. Could you point out where the problem might be?
Some tips on what to check would be appreciated.

Thanks.

Never mind. I resoldered r6 and t3. All working now.
Nice kit. The only real challenge is the ic on board soldering but it is easy with the help of some flux.