error 021: symbol already defined: "OnDialogResponse"

public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
    switch(dialogid)
    {
        case DIALOG_ATTACH_INDEX_SELECTION:
        {
            if(response)
            {
                if(IsPlayerAttachedObjectSlotUsed(playerid, listitem))
                {
                    ShowPlayerDialog(playerid, DIALOG_ATTACH_EDITREPLACE, DIALOG_STYLE_MSGBOX, \
                    "{FF0000}Toys", "Do you wish to edit the attachment in that slot, or delete it?", "Edit", "Delete");
                }
                else
                {
                    new string[4000+1];
                    for(new x;x<sizeof(AttachmentObjects);x++)
                    {
                        format(string, sizeof(string), "%s%s\n", string, AttachmentObjects[x][attachname]);
                    }
                    ShowPlayerDialog(playerid, DIALOG_ATTACH_MODEL_SELECTION, DIALOG_STYLE_LIST, \
                    "{FF0000}Toys - Model Selection", string, "Select", "Cancel");
                }
                SetPVarInt(playerid, "AttachmentIndexSel", listitem);
            }
            return 1;
        }
        case DIALOG_ATTACH_EDITREPLACE:
        {
            if(response) EditAttachedObject(playerid, GetPVarInt(playerid, "AttachmentIndexSel"));
            else RemovePlayerAttachedObject(playerid, GetPVarInt(playerid, "AttachmentIndexSel"));
            DeletePVar(playerid, "AttachmentIndexSel");
            return 1;
        }
        case DIALOG_ATTACH_MODEL_SELECTION:
        {
            if(response)
            {
                if(GetPVarInt(playerid, "AttachmentUsed") == 1) EditAttachedObject(playerid, listitem);
                else
                {
                    SetPVarInt(playerid, "AttachmentModelSel", AttachmentObjects[listitem][attachmodel]);
                    new string[256+1];
                    for(new x;x<sizeof(AttachmentBones);x++)
                    {
                        format(string, sizeof(string), "%s%s\n", string, AttachmentBones[x]);
                    }
                    ShowPlayerDialog(playerid, DIALOG_ATTACH_BONE_SELECTION, DIALOG_STYLE_LIST, \
                    "{FF0000}Toys - Bone Selection", string, "Select", "Cancel");
                }
            }
            else DeletePVar(playerid, "AttachmentIndexSel");
            return 1;
        }
        case DIALOG_ATTACH_BONE_SELECTION:
        {
            if(response)
            {
                SetPlayerAttachedObject(playerid, GetPVarInt(playerid, "AttachmentIndexSel"), GetPVarInt(playerid, "AttachmentModelSel"), listitem+1);
                EditAttachedObject(playerid, GetPVarInt(playerid, "AttachmentIndexSel"));
                SendClientMessage(playerid, 0xFFFFFFFF, "Hint: Use {FFFF00}~k~~PED_SPRINT~{FFFFFF} to look around.");
            }
            DeletePVar(playerid, "AttachmentIndexSel");
            DeletePVar(playerid, "AttachmentModelSel");
            return 1;
        }
    }
    return 0;
}

public OnPlayerEditAttachedObject( playerid, response, index, modelid, boneid,
                                   Float:fOffsetX, Float:fOffsetY, Float:fOffsetZ,
                                   Float:fRotX, Float:fRotY, Float:fRotZ,
                                   Float:fScaleX, Float:fScaleY, Float:fScaleZ )
{
    new debug_string[256+1];
	format(debug_string,256,"SetPlayerAttachedObject(playerid,%d,%d,%d,%f,%f,%f,%f,%f,%f,%f,%f,%f)",
        index,modelid,boneid,fOffsetX,fOffsetY,fOffsetZ,fRotX,fRotY,fRotZ,fScaleX,fScaleY,fScaleZ);

	print(debug_string);

    SetPlayerAttachedObject(playerid,index,modelid,boneid,fOffsetX,fOffsetY,fOffsetZ,fRotX,fRotY,fRotZ,fScaleX,fScaleY,fScaleZ);
    SendClientMessage(playerid, 0xFFFFFFFF, "You finished editing an attached object");