Problem with text in dimensions from Autocad file.

Dear Forum,

I inserted an autocad file  (floor plan with dimensions) to DS for Windows.

When I opened it and worked with dimensions,

the text of dimension get changed.

Arrows, spacing etc. stayed as in Autocad.

I tried to change the height of text in Drafting Style page and

it has this impact to all dimension in a plan?

(see image below)

Thanks all for any idea!

Sara