hdiv org.hdiv.filter.ValidatorFilter无法强制转换为javax.servlet.Filter

I'm trying integrate hdiv 2.0.4 with old struts 1.3.8 to maintain old system in security issues. but, when I integrated I got that - hdiv validator in web.xml cannot be cast to servlet filter. Any suggestions for this?I'm trying integrate hdiv 2.0.4 with old struts