diff --git a/registry.go b/registry.go
index 1e917dd..2b6bc05 100644
--- a/registry.go
+++ b/registry.go
@@ -77,7 +77,7 @@ func (rr *rpcRegistry) Invoke(codec protocol.RegistryCodec) (result interface{},
 	// Decode the args.
 
 	var in []reflect.Value
-	pValues, pInstances := methodSpec.getParamValues()
+	_, pInstances := methodSpec.getParamValues()
 
 	if nil != pInstances && 0 < len(pInstances) {
 		if errRead := codec.ReadParams(pInstances); errRead != nil {
@@ -86,7 +86,8 @@ func (rr *rpcRegistry) Invoke(codec protocol.RegistryCodec) (result interface{},
 		pCount := len(pInstances)
 		in = make([]reflect.Value, pCount+1)
 		for indexI := 0; indexI < pCount; indexI++ {
-			in[indexI+1] = pValues[indexI]
+			//in[indexI+1] = pValues[indexI]
+			in[indexI+1] = reflect.ValueOf(pInstances[indexI]).Convert(methodSpec.paramTypes[indexI])
 		}
 	} else {
 		in = make([]reflect.Value, 1)