Hi Fernando,
in your case please change the f4 attribute and context attribute and then try..
example :
ls_map-context_attr = 'EXT.ZZFLD000001'.
" Field from where F4 help was triggered and selection needs to come back
ls_map-f4_attr = 'ZTAB000004'. " Field in the search help
Thanks & Regards,
Srinivas.