Urgent : How to hide the field in (FPM) webdynpro-abap

Dear Experts,

i have requirement in FPM , my component is : FPM_FORM_UIBB  and Configration Name :ZHRESS_CC_PER_DTL_PERSDATA_SG

and Feeder Class is: CL_HRESS_PER_DETAIL_GENDER

my  requirement in my Personnel Profile under ESS, i need to hide the First Marriage field based on Marital Status field selection. i.e if Marital Status id

"Married" then i need to show the First Marriage field and make it Mandatory else i need to hide the First Marriage field.

now my problem is where i need to write the logic .

my Personnel Profile Screen is:

Thanks in Advance,

SudhaSuma.