Warning message at CRMD_ORDER

Hi,

I would like to show warning message at CRMD_ORDER when user saves a quotation.

Thus, I tried to call FM 'CRM_MESSAGE_COLLECT' in the BAdI ORDER_SAVE method 'IF_EX_ORDER_SAVE~CHECK_BEFORE_SAVE', with parameter iv_msgty='W'.

However, the message cannot be shown, unless I change the parameter iv_msgty = 'E'.

How can I show the warning message in CRMD_ORDER when a quotation is saved?

Regards,

Tony