救命啊，asp invoke 存储过程，出错

<%
set dbconnection = Server.CreateObject("ADODB.connection")
dbconnection.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;password =klmycity;Initial Catalog=test;Data Source=localhost"

set cmd=server.CreateObject("adodb.command")
set cmd.ActiveConnection=dbconnection

cmd.CommandType = 4


cmd.CommandText="Ptest"

cmd.Parameters.Append cmd.CreateParameter("@Kname",adchar,adParamInput,10)
cmd.Parameters.Append cmd.CreateParameter("@Kpass",adchar,adParamInput,10)

cmd("@Kname") = request("name")
cmd("@Kpass") = request("pass")

cmd.execute()
%>

存储过程Ptest执行没有问题，可ASP调用　的时候总是提示:
变量或者类型不正确，或者不在可以接受的范围之内，要不就是与其他数据冲突