How to make this text 3D?

Hello all.
I have create a logo from Illustrator. This is just a simple logo of elipse shape and text, i named it Logo LS.ai.

I want to create this logo become 3D, to do this i import this Logo LS.ai to the AE project, create a new composition, and drag this Logo LS.ai to the composition.

Then i create a shape by doing right clicking Logo LS.ai -> Create shape from vector layer.

'Create shape from vector layer' command doesn't create shape of text. Why?

So, in my Illustrator, i convert my text 'LS' to shape, by doing Object -> Expand.

Then i import and doing the same again and it works.

By converting layer to 3D in Ae, adding some extrude and adding light, it works great.

BUT, i want to change my logo to white,so i change fill of my logo to white like below :

Look, 'LS' with white color not 3D. How to make that text 3D too?
Thanks.