TIF and JPG files not getting converted to PDF

HI,

We have configured IBR to convert documents to PDF/A files. Although the documents are getting converted to PDF, the images are not getting converted to PDF files. Instead the weblayout files are remaining TIF or JPG images respectively.

We are using the PDFExportConverter component.

In CS, the following file formats are checked:

JPEG Image (ImageThumbnail)

TIFF Image (ImageThumbnail)

Is that normal behavior? Don't TIF and JPG files convert to PDF?

Thanks

Arijit