PdfCreator and PdfBox

Hi all, I use PdfBox 0.7.3 (last dotnet version available) to extract text from Pdf files using PDFTextStripper. With PdfCreator version 0.9.5 that use Ghostscript 8.61 all work fine, with latest versions (that upgarde Ghostscript version) text extracted is every time "null". Does anyone know if there is a solution to this?

Thank you