THis is the solution I have post last year in Image forum, try it and see if it solve.
in forum_stats2
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dNextStart = CDate(intMonthNum + 1 & "/01/" & intYearNum)
change with
if strComp(Month("04/05/2002"),"4") = 0 then
dNextStart = CDate(intMonthNum + 1 & "/01/" & intYearNum)
else
dNextStart = CDate("01/" & intMonthNum + 1 & "/" & intYearNum)
end if
it works in italian and english, I don't know for others language.
And try using 1033 and 1030