We have received your dxf file, thanks, and we have examined it to try and diagnose the problem.
There are 2 issues:
1. The text is being imported into Stardraw in White and because the default paper color in Stardraw is White, you are seeing White on White (ie, nothing). You can either change the paper color in Stardraw by selecting the Brush color (the far left hand color on the toolbar) to Gray and then selecting Options->Preferences->Paper Color. Or, you can change all the text in your document to another color by selecting the whole document (Ctrl + A) and then choosing the Font Color from the Toolbar (the far right hand color on the toolbar).
2. The second problem is a little trickier. We believe that all the walls and truss have been drawn as Splines. Stardraw is a Bezier Engine and there is no simple conversion between the two mathematical curve types. I suggest that you explode the AutoCAD file in your original application to break the Splines down to simpler entities.