Problem converting date from flat file PDATE

Hello,

I'm VERY new to BW. We are on version 7.2. I hope I am posting to the right area (attempt 2).

I'm trying to import a flat file, over whose format we have little or no control.  Dates are in the British format dd/mm/yyyy. After looking at (a lot of) other posts, I think I need to use the PDATE Conversion Routine in the DataSource Fields tab. However it is failing with the message:

Error 'Invalid date of birth' at conversion exit CONVERSION_EXIT_PDATE_INPUT (field TRADEDATE record 1, value 01/06/2012)

Obviously this date is valid (as a British date).

For the field TRADEDATE I have set (see screenshot) :

Data type to DATS,

External Length to 12

Conversion Routine to PDATE and

Format to External.

What is wrong with my setup?

Thanks in advance ...