Free form defined Java procedure

Hello,

I'm trying to code my method call in all free but I'm getting the error NoSuchMethodError when the program tries to call it. I know it's not a class path error and that it does exist because I have codded it in fixed format and it calls the method just fine. This is what I have, could anyone help me out with what I have defined incorrectly please?

Java Code:
public class SignatureGenerator3
{
public static String[] genSignedvalues(String PString1, String PString2, String PString3, String PString4)
{
...
}
}

Fixed format:
d genSig PR O EXTPROC(*JAVA:
d 'SignatureGenerator3':
d 'genSignedvalues')
d STATIC
d CLASS(*JAVA:'java.lang.String')
d dim(2)
d PassString1 O CLASS(*JAVA:'java.lang.String')
d Const
d PassString2 O CLASS(*JAVA:'java.lang.String')
d Const
d PassString3 O CLASS(*JAVA:'java.lang.String')
d Const
d PassString4 O CLASS(*JAVA:'java.lang.String')
d Const

Free Format:
Dcl-Pr genSig Like(Values) Static
EXTPROC(*Java:'SignatureGenerator3':'genSignedvalues');
PassString1 Object(*Java:'jav.lang.String') CONST;
PassString2 Object(*Java:'jav.lang.String') CONST;
PassString3 Object(*Java:'jav.lang.String') CONST;
PassString4 Object(*Java:'jav.lang.String') CONST;
END-PR;

Dcl-S values Object(*Java:'java.lang.String') Dim(2);

Thanks,
Robert.