Oligo 4.0-s program

[SPAGNOL at PLAUTO.CSATA.IT]

Dear colleagues,
If somebody , as I do, uses Oligo 4.0-s to design his primers, 
could he be so kind as to share its opinions about this question?: 
Is just my impression or the program is extraordinarily, maybe 
excessively severe? If I do a combined search, 9 time out of ten 
the program does not find two primers which could give a reasonable 
probability of success. I use the program default parameters.
Thanks in advance for your answers.