Can someone look at my code?

I have 3 tables supports usage of a website. I need a stored procedure to add a new user who currently accessing the website through page pname. The command shows : "Procedure created with compilation errors", can someone point it out my error?
Create or replace procedure Enter_website
(u_name in users.u_id%type, page_name in users.pname%type) as
user_name integer := 0;
p_found integer :=0;
begin
select count(*) into user_name from users where u_id = u_name;
select count(*) into p_found from page where pname = page_name;

if (p_found >0) then
if (user_name =0) then
insert into users values(u_name, 1, page_name,1 );
update page
set total_enter = total_enter+1
where pname = page_name;
end if;
if (user_name > 0) then
update users
set ustatus = 1,
total_visit = total_visit + 1,
pname = page_name
where u_id = u_name;
end if;
end if;
end;
/
thanks