The determination by the Department of Health and Rehabilitative Services that the appellant failed to carry her burden to establish good cause for her failure to coop*986erate in obtaining child support from the father, see Fla.Admin.Code Rule 10C-1.-96(3), a burden which most assuredly was hers, see Learned v. Department of Public Welfare, 15 Mass.App.Ct. 923, 444 N.E.2d 398 (1983), is supported by substantial evidence and is therefore

Affirmed.