i forget my keyguard code..

Hello Septian,

Would you please elaborate the problem?

In case this is related to our Mobile Security's Anti-Theft feature, kindly refer to AniaC's post to contact Support, reset security code cases have to be handled outside of the F-Secure Community.
http://community.f-secure.com/t5/Mobile/Forgot-lost-your-security-code-Read-this/td-p/7439

For alternative way to unlock your mobile, refer to the following post:
http://community.f-secure.com/t5/Protection-Safe/f-secure-mobile-password/m-p/11397#M2688