diff --git a/network/mhfpacket/msg_mhf_announce.go b/network/mhfpacket/msg_mhf_announce.go
index 8e3971497..c4c9deb7f 100644
--- a/network/mhfpacket/msg_mhf_announce.go
+++ b/network/mhfpacket/msg_mhf_announce.go
@@ -28,7 +28,8 @@ func (m *MsgMhfAnnounce) Parse(bf *byteframe.ByteFrame, ctx *clientctx.ClientCon
 	m.IPAddress = bf.ReadUint32()
 	m.Port = bf.ReadUint16()
 	_ = bf.ReadUint8()
-	_ = bf.ReadUint16()
+	_ = bf.ReadUint8()
+	_ = bf.ReadUint8()
 	m.StageID = bf.ReadBytes(32)
 	_ = bf.ReadUint32()
 	m.Type = bf.ReadUint8()
diff --git a/network/mhfpacket/msg_sys_load_register.go b/network/mhfpacket/msg_sys_load_register.go
index 24dc54052..730616d65 100644
--- a/network/mhfpacket/msg_sys_load_register.go
+++ b/network/mhfpacket/msg_sys_load_register.go
@@ -1,8 +1,7 @@
 package mhfpacket
 
 import (
-	"fmt"
-
+	"errors"
 	"erupe-ce/common/byteframe"
 	"erupe-ce/network"
 	"erupe-ce/network/clientctx"
@@ -25,22 +24,12 @@ func (m *MsgSysLoadRegister) Parse(bf *byteframe.ByteFrame, ctx *clientctx.Clien
 	m.AckHandle = bf.ReadUint32()
 	m.RegisterID = bf.ReadUint32()
 	m.Unk1 = bf.ReadUint8()
-	fixedZero0 := bf.ReadUint16()
-	fixedZero1 := bf.ReadUint8()
-
-	if fixedZero0 != 0 || fixedZero1 != 0 {
-		return fmt.Errorf("expected fixed-0 values, got %d %d", fixedZero0, fixedZero1)
-	}
+	_ = bf.ReadUint8()
+	_ = bf.ReadUint16()
 	return nil
 }
 
 // Build builds a binary packet from the current data.
 func (m *MsgSysLoadRegister) Build(bf *byteframe.ByteFrame, ctx *clientctx.ClientContext) error {
-	bf.WriteUint32(m.AckHandle)
-	bf.WriteUint32(m.RegisterID)
-	bf.WriteUint8(m.Unk1)
-	bf.WriteUint16(0)
-	bf.WriteUint8(0)
-
-	return nil
+	return errors.New("NOT IMPLEMENTED")
 }
diff --git a/network/mhfpacket/msg_sys_operate_register.go b/network/mhfpacket/msg_sys_operate_register.go
index e4213d45d..6978609b1 100644
--- a/network/mhfpacket/msg_sys_operate_register.go
+++ b/network/mhfpacket/msg_sys_operate_register.go
@@ -1,8 +1,7 @@
 package mhfpacket
 
 import (
-	"fmt"
-
+	"errors"
 	"erupe-ce/common/byteframe"
 	"erupe-ce/network"
 	"erupe-ce/network/clientctx"
@@ -12,7 +11,6 @@ import (
 type MsgSysOperateRegister struct {
 	AckHandle      uint32
 	SemaphoreID    uint32
-	fixedZero      uint16
 	RawDataPayload []byte
 }
 
@@ -25,12 +23,7 @@ func (m *MsgSysOperateRegister) Opcode() network.PacketID {
 func (m *MsgSysOperateRegister) Parse(bf *byteframe.ByteFrame, ctx *clientctx.ClientContext) error {
 	m.AckHandle = bf.ReadUint32()
 	m.SemaphoreID = bf.ReadUint32()
-	m.fixedZero = bf.ReadUint16()
-
-	if m.fixedZero != 0 {
-		return fmt.Errorf("expected fixed-0 values, got %d", m.fixedZero)
-	}
-
+	_ = bf.ReadUint16()
 	dataSize := bf.ReadUint16()
 	m.RawDataPayload = bf.ReadBytes(uint(dataSize))
 	return nil
@@ -38,11 +31,5 @@ func (m *MsgSysOperateRegister) Parse(bf *byteframe.ByteFrame, ctx *clientctx.Cl
 
 // Build builds a binary packet from the current data.
 func (m *MsgSysOperateRegister) Build(bf *byteframe.ByteFrame, ctx *clientctx.ClientContext) error {
-	bf.WriteUint32(m.AckHandle)
-	bf.WriteUint32(m.SemaphoreID)
-	bf.WriteUint16(0)
-	bf.WriteUint16(uint16(len(m.RawDataPayload)))
-	bf.WriteBytes(m.RawDataPayload)
-
-	return nil
+	return errors.New("NOT IMPLEMENTED")
 }