If you exported from Studio check the export scale option. By default it will be in centimeters, but if you want to import as a Poser morph you need to export from Studio at Poser scale, otherwise, even if you get the morph to load, the Poser figure will change size when you apply the morph.

If this has happened you can fix the scale by importing your morphed obj into Studio at default cm and then exporting at Poser scale.

If you import the model into UVmapper as suggested above it will tell you the number of groups and vertices. These should match between the original obj and your morphed version.

I can't help with full body morph loading in Poser though.

Cheers

Ian