HI there… I don’t know if this will work for you, but this is what I did and I hope this helps:
I went to General Options > Registration/Profile Fields & Options
Then I clicked on “Add new field”
Form Field Type* selected – select menu drop down
Field Label/Desc: * DOB Month
Unique Field ID: * DOB_Month
Option Configuration File: * (one option per line):
month|select|default
1|Jan
2|Feb
3|Mar
4|Apr
5|May
6|Jun
7|Jul
8|Aug
9|Sep
10|Oct
11|Nov
12|Dec
Form Field Type* selected – select menu drop down
Field Label/Desc: * DOB Day
Unique Field ID: * DOB_Day
Option Configuration File: * (one option per line):
day|1
day|2
day|3
day|4
day|5
day|6
day|7
day|8
day|9
day|10
day|11
day|12
day|13
day|14
day|15
day|16
day|17
day|18
day|19
day|20
day|21
day|22
day|23
day|24
day|25
day|26
day|27
day|28
day|29
day|30
day|31
day|select|default
Form Field Type* selected – select menu drop down
Field Label/Desc: * DOB Day
Unique Field ID: * DOB_Day
Option Configuration File: * (one option per line):
year|2012
year|2011
year|2010
year|2009
year|2008
year|2007
year|2006
year|2005
year|2004
year|2003
year|2002
year|2001
year|2000
year|1999
year|1998
year|1997
year|1996
year|1995
year|1994
year|1993
year|1992
year|1991
year|1990
year|1989
year|1988
year|1987
year|1986
year|1985
year|1984
year|1983
year|1982
year|1981
year|1980
year|1979
year|1978
year|1977
year|1976
year|1975
year|1974
year|1973
year|1972
year|1971
year|1970
year|1969
year|1968
year|1967
year|1966
year|1965
year|1964
year|1963
year|1962
year|1961
year|1960
year|1959
year|1958
year|1957
year|1956
year|1955
year|1954
year|1953
year|1952
year|1951
year|1950
year|1949
year|1948
year|1947
year|1946
year|1945
year|1944
year|1943
year|1942
year|1941
year|1940
year|1939
year|1938
year|1937
year|1936
year|1935
year|1934
year|1933
year|1932
year|1931
year|1930
year|1929
year|1928
year|1927
year|1926
year|1925
year|1924
year|1923
year|1922
year|1921
year|1920
year|1919
year|1918
year|1917
year|1916
year|1915
year|1914
year|1913
year|1912
year|1911
year|1910
year|1909
year|1908
year|1907
year|1906
year|1905
year|1904
year|1903
year|1902
year|1901
year|1900
year|select|default