User defined function not working for float,double

[Abiri Masoni]

hi all!
I'm trying to use a user-defined function in Telerik Reporting Q2 2009. but i get an error message "Undefined function call" when i use float or double as an argument in the function.
My function is
public static float Myfloat(float x)
        {
            return x;
        }

which i call using
=MyFloat(16.5)

BTW, if a change it like this

public static float Myfloat(int x)
        {
            return x;
        }

which i call using
=MyFloat(16)

it works fine.

What may be the problem? Thnx so much.