Infoset CRMM_BUT_MKTPERM_REL - no oppontunity to choose Permission for LET(ter)

Hi'

We are about to implement Marketing Permission.

I want to give our Marketing employees the opportunity to make segmentation at the Permission Data for Contaxts. I use Standard Infoset CRMM_BUT_MKTPERM_REL.

This gives me oportunity to choose Telephone, E-mail, Fax and SMS - but not for Letter.

How can I solve this?

Thank you in advance

Regards

Lone