My v4 Tamagotchi goes to school and plays games a lot, and he should be getting skill points for that, but the number just stays the same. I can't figure out what's going on!
I think it could be a minor glitch or it could be a serious problem.... Try resetting then downloading it or perhaps resetting it completly and start again
Or you could change the battery. Thats all the advice i got
Since you say it's a v4, it could be a common glitch--quite a few glitches were reported about v4 in 2006, which is the main reason Bandai came up with v4.5. I have a v4.5, and it works fine, so it's probably either the version or the battery.