Hi,
ok, I found out what the problem is.
On some of your fields with options (radios, selects) you have created several options that have the same value (within one field)
For example Field "Medeni Durumunuz"
First option has value 99
Third option has value 99
Forth option has value 99
Fifth option has value 99
That is somethings which you must never ever do, when you work with form, because the value of the option must be unique. It is the value that is submitted when the form is send and the value that is used by the code in order to figure which option the user selected. So if in your example the first option is selected, the Visforms code assumes, that the user has selected the first, third, forth and fifth option and this is obviously an invalide selection, because the select is set up to only accept the selection of one option.
I know, why you have created options with the same value, because you want to use them in a field of type calculation, and the value which you want to use in the calculation is the same for some of the options. This is actually a mistake, which never happened before people started working with calculations, because you would usually not have the idea to create two options with the same value. Therefore there is no validation in the field configuration which warns you, that you have set up the field in a bad way. And the error message, which is send when the user submits the form, is not very helpful either. Sorry for that.
You have to set up your form/fields differently. I'm sorry that this becomes more complicated then, but there is no other way. You must use different values for each option (for example 1, 2, 3, 4 and 5) and then for example in the calculation field set the proper value which the calculation should use 1 -> 99, 2 ->199, 3 ->33. This is not very nice because you have many if statements in the calculation, but it is the only way.
Regards,
Aicha
P.S.
It is not possible to make the values different by prefixing them with zeros (i.e. 099, 0099), these values are considered identical by Visforms.