Fixed text messes layout after updates

[camille.st]

Hi everybody!

I just updated the last version of LayTheme and Wordpress and my old custom code doesn’t seem to be working anymore. I would like to fix the text on the left column when scrolling.

I was using this code, the text is indeed fixed but the margins are crazy and the block goes trough the entire page (see here).

.xxx {
    position:fixed;
}

Should I add something to make it right again? I have already tried "sticky" and "static" as advised on previous posts but it doesn’t seem to have any effect.

Thank you so much in advance!

[arminunruh]

.xxx {
    position:fixed;
width: 500px;
left: 50px;
}

u could add more css to it like this one that gives it a width and some space to the left