Need help with Essentials Kits

I have a problem with kits. I put them in, save and restart server. When I restart, they are gone. This is what I want them to be:

Code:

kits:
  wizard
    delay: 10
    items:
      - 379 1
      - 382 5
      - 372 10
      - 373 10
      - 380 1
      - 373:32702 2
      - 373:16382 3
  warrior
    delay: 10
    items:
      - 272 1
      - 298 1
      - 299 1
      - 300 1
      - 301 1
  archer
    delay: 10
    items:
      - 261 1
      - 262 32
      - 302 1
      - 303 1
      - 304 1
      - 305 1
  farmer
    delay: 10
    items:
      - 291 1
      - 392 10
      - 391 10
      - 295 15
      - 361 5
      - 362 5
      - 351:15 30
      - 3 64
  explore
    delay: 10
    items:
      - 395 5
      - 345 1
      - 347 1
      - 392 3
      - 333 2
      - 398 1
      - 383:90 3
      - 50 32
  mech
    delay: 10
    items:
      - 331 32
      - 76 16
      - 356 8
      - 23 5
      - 69 5

but this is the error for every ':'

Code:

ERROR:
 
mapping values are not allowed here
  in "<unicode string>", line 3, column 10:
        delay: 10
            ^

any help would be amazing