Oject Required

can u looked the error:

Microsoft VBScript runtime error '800a01a8'

Object required: ''
is it i misslooked some code?

nama=request("nama")
Set isinama = Server.CreateObject("ADODB.Recordset")
sql="select * from markah where namapelajar='"&nama&"'"
<br><%while not isinama.eof%>
<input name="a" type="radio" value="<%=isinama("nilai1a")%>">
<input name="a" type="radio" value="<%=isinama("nilai1a")%>">
<input name="a" type="radio" value="<%=isinama("nilai1a")%>">
<%isinama.movenext
wend%>