Problem with enlarging illustrator files

[Metal Fusion]

Hi,
I just drew a logo in illustrator cs.
After drawing it, i wanted to enlarge the whole logo. But, when i try to enlarge it, some of the lines become thinner.

here is an attached shot of the problem:



any ideas?

thanks

Metal Fusion

[wouter999]

You've probably used strokes to make the outlines. When you're happy with what it looks like, select all the lines and go to Edit>Path>Outline Strokes. Your strokes are now converted to paths and they will resize properly.

[Saint Benedetta]

yeah that happens to me too but the opposite, my lines go thicker.

[sense]

Illustrator scales strokes on demand.
There's an option in your preferences.

edit>preferences>scale strokes and effects