ok, already found the solution.
i used [field1]*100+[field2]*12.5 , but this didnt work, when I used extra bracket : ( [field1]*100) + ( [field2]*12.5) then the result was show correctly....
very strange, but this solved my problem.
greetz
I've put some calculated fields into my form.
First they were working perfectly. I closed the database , few hours later, I reopen.... nothing works anymore.
I don't understand it why.
Can some one help me