# Trouble with building **URL:** \ **Category:** Help\ **Created:** [May 18, 2018, 7:16am UTC](https://talk.jekyllrb.com/t/trouble-with-building/1797 "2018-05-18T07:16:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![HeckCas](https://avatars.discourse-cdn.com/v4/letter/h/e19adc/32.png) [@HeckCas](https://talk.jekyllrb.com/u/HeckCas)\ **Post date:** [May 18, 2018, 7:16am UTC](https://talk.jekyllrb.com/t/trouble-with-building/1797/1 "2018-05-18T07:16:25Z")
Hi!, i do not if i got a trouble or i do not know how to run it the right way I configured my config.yml with all my stuff & run jekyll serve then i’ve been working on the index.html (not .md) the .html, renaming some classes adding others, and giving some style with css you know, save & refresh the [http://127.0.0.1:4000/](http://127.0.0.1:4000/) and it goes awesome, everything as i wanted to be BUT if i change something in the config.yml OR i created another post, the page forgives the whole new changes i made, also delete the new images i saved on images folder Am i wrong or smth? Can i modify the index.html? or is that the problem ---
**Author:** ![chrisfinazzo](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/chrisfinazzo/32/561_2.png) [@chrisfinazzo](https://talk.jekyllrb.com/u/chrisfinazzo)\ **Post date:** [May 18, 2018, 2:40pm UTC](https://talk.jekyllrb.com/t/trouble-with-building/1797/2 "2018-05-18T14:40:55Z")
Do you have a sample repo we can look at? ---
**Author:** ![rdyar](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/rdyar/32/710_2.png) [@rdyar](https://talk.jekyllrb.com/u/rdyar)\ **Post date:** [May 18, 2018, 4:12pm UTC](https://talk.jekyllrb.com/t/trouble-with-building/1797/3 "2018-05-18T16:12:42Z")
Jekyll does not watch for changes to the config - so if you make a change there you need to restart Jekyll Serve. As for images disappearing, are you putting them in the \_site folder? if so that is the problem, the \_site folder gets nuked every time jekyll builds.