CustomPress fields not working with CSV Importer

Hi,

I have set up my custom fields through CustomPress on product posts and am now trying to import data into them using CSV Importer.

The importer recognises custom taxonomies, but doesn't recognise the single line or multi-line text fields, which I desperately need. I have tried both with field name (i.e ct_curre.....") and the field label (i.e."Current_Offers") but am getting nowehere. Has anyone else had success importing into custom fields without a premium plugin?

Thanks,
Mel